Answers
Answer:
Uracil
Explanation:
Uracil is only found in RNA; thymine is its replacement in DNA.
Answer:
UracilExplanation:
In RNA, uracil is a nitrogenous base that replaces thymine. uracil only forms two hydrogen bonds with adenine.
Related Questions
When do
resources
become a cause
of competition?
A. when a resource is mutated
B. when a resource is unlimited
C. when a resource is limited and being used by multiple
species
Answers
Answer: C. when a resource is limited and being used by multiple
species
Explanation:
Competing for Resources
Niche- the space, environmental
conditions, and resources
that a species needs in
order to survive and
reproduce
If niches overlap . . .
• Two or more species
rely on the same
limited resources.
• The result is
competition.
Competitive exclusion: one of
the competing species unable to
gain sufficient resources
Which of the following describes a lysosome
Answers
pick out the characteristics that make the pulmonary alveoli a place for gaseous exchange
Answers
Answer:
Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls - allow gases to pass through. Extensive blood supply - ensuring oxygen rich blood is taken away from the lungs and carbon dioxide rich blood is taken to the lungs.
NEED HELP WILL GIVE BRAINLISEST RN
Answers
From punnett squares, we can get genotypic and phenotypic ratios and probabilities among the progenies. Cross 1: genotypic ratio 1:2:1. Phenotypic ratio 3:1. Cross 2: 75% probability of having a white horn.
What is a punnett square?
The Punnett square is a graphic representation that shows the different types of gamete combinations according to the alleles involved in a cross.
Punnett square shows the probabilities of getting offspring with different genotypes and their consequent phenotypes.
Cross 1:
Parentals) Ee x Ee
Gametes) E e E e
Punnett square) E e
E EE Ee
e Ee ee
F1) Genotype
25% = 1/4 of the progeny is expected to be homozygous dominant EE
50% = 2/4 of the progeny is expected to be heterozygous, Ee
25% = 1/4 of the progeny is expected to be homozygous recessive, ee
Phenotype
75% = 3/4 of the progeny is expected to express one eye (1/4 EE + 2/4 Ee)25% = 1/4 of the progeny is expected to express two eyes (ee)Genotypic ratio ⇒ 1:2:1 ⇒ 1/4 EE : 2/4 Ee : 1/4 ee
Phenotypic ratio ⇒ 3:1 ⇒ 3/4 one eye : 1/4 two eyes
Cross 2:
Parentals) Ww x Ww
Gametes) W w W w
Punnett square) W w
W WW Ww
w Ww ww
F1) Genotype
25% = 1/4 of the progeny is expected to be homozygous dominant WW
50% = 2/4 of the progeny is expected to be heterozygous, Ww
25% = 1/4 of the progeny is expected to be homozygous recessive, ww
Phenotype
75% = 3/4 of the progeny is expected to express white horn (1/4 WW + 2/4 Ww)25% = 1/4 of the progeny is expected to express brown horn (ww)Genotypic ratio ⇒ 1:2:1 ⇒ 1/4 WW : 2/4 Ww : 1/4 ww
Phenotypic ratio ⇒ 3:1 ⇒ 3/4 white horn : 1/4 brown horn
Offspring has 75% probability of having a white horn.
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The plasma membrane of a bacteria cell _____.
Answers
What is the attentional spotlight and how is it related to divided-attention tasks?
Answers
The attentional spotlight refers to the idea that attention is like a spotlight that can be focused on a particular object or location, allowing us to selectively process and attend to relevant information while ignoring irrelevant information. It is related to divided-attention tasks because of how attention can be selectively directed to different stimuli or sources of information
Divided-attention tasks are tasks that require individuals to attend to multiple streams of information or stimuli simultaneously. These tasks can be challenging because attention is a limited resource, and dividing attention between multiple sources of information can lead to errors and decreased performance.
The attentional spotlight is related to divided-attention tasks because it illustrates how attention can be selectively directed to different stimuli or sources of information. When individuals are engaged in divided-attention tasks, they may need to shift the attentional spotlight rapidly between different sources of information in order to effectively process and attend to all relevant information.
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Differentiata between Loam soil and sandy. Team soil soil
Answers
Answer:
The key difference between sandy soil and loamy soil is that sandy soil is less fertile due to the low content of nutrients, moisture, and humus, whereas loamy soil has more nutrients, moisture, and humus and is more fertile.
Explanation:
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loam soil provides a well-balanced environment for plant growth, with good drainage, moisture retention, and nutrient availability.
Sandy soil, on the other hand, drains quickly but lacks moisture retention and nutrient-holding capacity, requiring additional irrigation and fertilization.
The choice of soil type depends on the specific needs of the plants and the environmental conditions in which they are grown.
Loam soil and sandy soil are two distinct types of soil with different characteristics and properties.
Loam soil is considered to be ideal for plant growth due to its balanced composition.
It is a combination of sand, silt, and clay particles. Loam soil has a granular texture and is often described as crumbly.
It has good drainage capabilities, allowing excess water to flow through while retaining enough moisture for plant roots.
The presence of silt and clay particles helps in retaining nutrients, making them available to plants.
Loam soil is fertile and provides a suitable environment for root development.
It offers a good balance of air spaces and moisture-holding capacity, promoting healthy plant growth.
Sandy soil, on the other hand, primarily consists of larger sand particles.
It has a gritty texture and is characterized by its high drainage capacity.
Sandy soil drains water quickly, which can be beneficial in preventing waterlogged conditions.
However, due to its coarse texture, it does not retain moisture well, making it prone to drought.
Sandy soil also has low nutrient retention capability, as nutrients tend to leach away with excessive watering or rainfall.
As a result, sandy soil often requires more frequent irrigation and the application of fertilizers to compensate for the lack of nutrients.
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Which of the following is "not" likely to cause a magnet to lose
its magnetism?
a. Striking it with a hammer.
b. Cooling it.
c. Dropping it repeatedly on the ground.
d. Heating it.
The magnetic field of a magnet is strongest
a. at its north pole.
b. at its south pole.
c. in the middle.
d. at both of its poles.
Answers
The answers include the following:
The following which is "not" likely to cause a magnet to lose its magnetism is cooling it and is therefore denoted as option B.The magnetic field of a magnet is strongest at at both of its poles and is denoted as option D.What is a Magnet?This is referred to as a material or object that produces a magnetic field and it has two poles which are the North and south poles in which the magnetic field of a magnet is strongest.
Cooling a magnet will not cause a magnet to lose its magnetism but instead the magnetism will increase because the molecules within the magnet will move slower because they have less kinetic energy so there is less vibration within the magnet's molecules thereby resulting in more concentrated magnetic field that strengthens the magnet.
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Where do the tRNA take amino acids?
to the nucleus
outside of the cell
to the ribosome
Answers
Answer:
To The Ribosome.
Explanation:
To start, let's review. First off, tRNA means transfer RNA; type of RNA that carries amino acids to the ribosome. An amino acid is a carboxylic acid with an amino group and the building block of proteins. The nucleus is the "brain" of the cell, the control center of the cell, where genetic material (DNA) is found, the nucleus is in charge of everything that happens inside of a cell. The nucleus is the largest and most important part of the cell. Nuclear Envelope. The general purpose of the nucleus is to predetermine and control the production of proteins. It does this by storing the protein code in the DNA, which is hereditary. A cell is the smallest part of a living thing that can carry out the activities needed for life. The ribosome is a cell organelle constructed in the nucleolus and functioning as the site of protein synthesis in the cytoplasm; consists of rRNA and protein molecules, which make up two subunits. Since we're done reviewing, let's go through the processes of how the tRNA take the amino acids to the ribosome. There are two steps in protein synthesis. They are transcription and translation. During transcription, mRNA (Messenger RNA) is formed in the nucleus of the cell. After mRNA has been made, it leaves the nucleus and goes to the ribosomes in the cytoplasm, where translation occurs. (DNA never leaves the nucleus.) During translation, mRNA attaches itself to the ribosome. Then, tRNA (Transfer RNA) reads the mRNA codons (a codon is a sequence of three nucleotides that code for a protein) and attaches amino acids accordingly. This continues until tRNA reaches a stop codon. Translation is the second phase of protein synthesis. It follows transcription, in which the information in DNA is "rewritten" into mRNA. During translation, the mRNA attaches to a ribosome. Transfer RNA (tRNA) molecules then "read" the mRNA code and translate the message into a sequence of amino acids. Every three nucleotides in the mRNA make up one codon, which corresponds to one amino acid in the resulting protein. The ribosome tracks along the mRNA until it reaches a stop codon, signaling the assembly of mRNA and ribosome to break apart. Protein synthesis is the process where cells create proteins. There are two steps in protein synthesis. They are transcription and translation. During transcription, mRNA (Messenger RNA) is formed in the nucleus of the cell. After mRNA has been made, it leaves the nucleus and goes to the ribosomes in the cytoplasm, where translation occurs. (DNA never leaves the nucleus.) During translation, mRNA attaches itself to the ribosome. Then, tRNA (Transfer RNA) reads the mRNA codons (a codon is a sequence of three nucleotides that code for a protein) and attaches amino acids accordingly. This continues until tRNA reaches a stop codon.
4. What are the two new cells called that are produced after cell division is complete?
DNA cells
prophase cells
parent cells
daughter cells
Answers
Answer:
DNA and daughter cells are two new cells produced after cell division
↓Answer ↓
DAUGHTER CELLS
↓Explanation↓
Mitosis is a type of cell division in which one cell (the mother) divides to produce two new cells (the daughters) that are genetically identical to itself. In the context of the cell cycle, mitosis is the part of the division process in which the DNA of the cell's nucleus is split into two equal sets of chromosomes.
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A cladogram of five species is shown. Based on the cladogram, the ancestral species most likely had-
Answers
Bromothymol blue (BTB) is a chemical that can be used as an indicator of the pH of a solution. Because CO2 produces an acid in water, BTB can indirectly measure how much CO2 is present in a solution. When placed in solutions with neutral pH (little CO2), the solution appears green. In solutions with low pH (high CO2), the solution appears yellow.
A teacher performed a demonstration to investigate how photosynthesis and respiration cycle carbon and oxygen. She placed a few drops of BTB in a test tube containing distilled water. Because distilled water has a neutral pH, the solution appeared green. The teacher used a straw to blow into the solution, and the solution turned yellow. She then placed an aquatic plant into the test tube, covered it to keep it air tight, and placed it under a light for 24 hours.
What color would the solution in the test tube be after being in the light, and what would it be if it were then placed in the dark for 24 hours, and why?
A
Green after being placed in the light because the plant would remove CO2 by photosynthesis; yellow after being placed in the dark because the plant would release CO2 by respiration.
B
Yellow after being placed in the light because the plant would release CO2 by photosynthesis; green after being placed in the dark because the plant could not photosynthesize in the dark.
C
Green after being placed in the light because the plant would remove CO2 by photosynthesis; green after being placed in the dark because no CO2 would enter the tube since it is air tight.
D
Yellow after being placed in the light because the plant would release CO2 by photosynthesis; yellow after being placed in the dark because no CO2 could leave the tube since it is air tight.
Answers
Answer:
A. Green after being placed in the light because the plant would remove CO2 by photosynthesis; yellow after being placed in the dark because the plant would release CO2 by respiration.
Explanation:
According to this question, Bromothymol blue (BTB) is a chemical that can be used as an indicator of the pH of a solution. The presence or absence of CO2 in a solution decreases or increases the pH of the solution respectively.
- BTB appears green in a neutral pH i.e. little CO2
- BTB turns yellow in a low pH i.e. high CO2
Plants, in the presence of light, will perform photosynthesis and use CO3 as a reactant while in the dark, will perform cellular respiration and release CO2 as a waste product. Hence, in this case where an aquatic plant was placed into a test tube and covered it to keep it air tight.
- When placed under light for 24 hours, the aquatic plant will undergo photosynthesis and remove CO2 from the solution to make the solution appear GREEN due to neutral pH.
- When placed in the dark for 24 hours, the aquatic plant will undergo cellular respiration and release CO2 into the solution making the solution appear YELLOW due to low pH.
Describe how you might figure out if something was made out of cells.
Answers
Answer:All living organisms are composed of cells, from just one to many trillions, whose details usually are visible only through a microscope.
Explanation:
To determine if something is made out of cells, several approaches can be employed, including microscopic and biochemical assays for physical and chemical assessments.
Visual inspection using a microscope can reveal the presence of cell-like structures, such as membranes, nuclei, or organelles. Staining techniques, such as fluorescent dyes or immunohistochemistry, can further enhance the visibility of cellular components.
DNA analysis can also be conducted by extracting genetic material from the sample and performing sequencing or polymerase chain reaction (PCR) to detect DNA specific to cells.
Biochemical assays can be used to identify cellular components, such as proteins or enzymes, which are characteristic of cell composition.
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How do the newly formed sperm cells compare in chromosome number compared to the starting cells?
A) They contain exactly the same number of chromosomes
B) The contain half the number of chromosomes
C) The contain double the number of chromosomes
Answers
The newly formed sperm cells compare in chromosomes contain half the number of chromosomes compared to the starting cells. Therefore, option (B) is correct.
What is a chromosome?The chromosome is packaged into thread-like structures and present in the nucleus of each cell. Each chromosome is structurally composed of DNA that is firmly coiled around special proteins known as histones. Chromosomes are only visible during the process of cell division and are not visible even under the microscope.
All living organisms have 23 pairs of chromosomes. Among these 22 pairs of these chromosomes are known as autosomes which are identical in both males and females. The 23rd pair is called allosomes creating differences between the sexes.
The number of chromosomes in a new formed sperm cell is only half the number of chromosomes in the starting cell. This process reduces the chromosome number by half from 46 to 23 to form sperm and egg cells.
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How many genes are needed to control a single-gene trait? A. two B. millions C. one
Answers
Answer: one. A single gene trait is controlled by one gene, its in the name :)
Why are carbon important to these molecules
Answers
Answer:
Hiya! ^^
Explanation:
Carbon's molecular structure allows it to form bonds with many elements, itself other carbon elements. Because of this, it can form long chain molecules, each having different properties. Carbon remains in balance with other chemical reactions in the atmosphere and water because of its stability.
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Which option lists materials in order by their ability to allow the flow of
electrons, from least easily to most easily?
A. Insulator, semiconductor, conductor
B. Conductor, semiconductor, insulator
c. Semiconductor, insulator, conductor
O D. Semiconductor, conductor, insulator
Answers
The correct option that lists materials in order by their ability to allow the flow of electrons, from least easily to most easily, is Insulator, Semiconductor, and Conductor, which is in Option A.
What are an electron, an insulator, etc.?The ability of a material to conduct electricity depends on the number of free electrons that are available to move through the material. In an insulator, there are very few free electrons, which means that the material does not conduct electricity very well. Insulators are typically used to prevent the flow of electricity, for example, in electrical wiring, where plastic or rubber coatings are used to insulate the copper wires.
Hence, the correct option that lists materials in order by their ability to allow the flow of electrons, from least easily to most easily, is Insulator, Semiconductor, and Conductor, which is in Option A.
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Which question could best be tested using this setup? A. Do plants continue to grow in the absence of light? B. Do green plants need light for cell division to occur? C. Do green water plants release a gas in the presence of light? D. Do the roots of water plants absorb minerals in the absence of light?
Answers
Answer:
b
Explanation:
because the green plants need light or the cell division for it to work.
Answer: A. Yes
Explanation: I think so because they're looking for the light (they grow taller so they can find light)
Which of the following events takes place during the mitotic phase of the cell cycle?
O Duplication of DNA
Duplication of
DNA
Duplication of
centrioles
Which of the following events takes place during the mitotic phase of the cell cycle?
Separation of Chromosomes
Duplications of centrioles
Division of Cytoplasm
Separation of
chromosomes
Division of
cytoplasm
Answers
The events that takes place during the mitosis are separation of chromosomes, duplication of centrioles, division of cytoplasm, separation of chromosomes and division of cytoplasm.
Phases of mitosisThe majority of the cell's life is spent in the interphase, just before prophase, where mitosis's start-up is prepared for (the DNA is copied). The prophase is technically the first phase of this process, though, because the actual process requires the division of the nucleus. The duplicated chromosomes are aligned, separated, and transferred to the cell's opposite poles during the multistep mitotic phase, after which the cell divides into two brand-new, identical daughter cells.The cell divides its cytoplasm and divides its DNA into two sets during the mitotic (M) phase to produce two new cells.For more information on mitosis kindly visit to
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Which letter in the diagram below represents the location where blood ispumped to the lungs and picks up oxygen?A. AB. Cc. BD. D
Answers
The pumping of blood occurs from the heart to the tissues. However, before it is sent to the body it must be oxygenated by passing through the lungs.
It does this by passing from the right ventricle through the pulmonary artery to the lungs, where it is oxygenated and returned to the heart through the pulmonary vein. Then passes to the left ventricle which pumps it to the other tissues through the aorta.
The structures in the diagram must be:
a: superior vena cava
b: left atrium
c: pulmonary artery
d: aorta
Because the pulmonary artery sends blood to the lungs, the answer is c (pulmonary artery)
SPEED
Some factories have started using large tanks of bacteria to remove carbon dioxide from the atmosphere. As more factories start to do this, the amount of carbon dioxide in the atmosphere could decrease over time. If this happens, and if energy coming from the sun and the amount of carbon dioxide being put into the atmosphere otherwise stay the same, what would happen to the total amount of energy in the Earth system and to global average temperature? If there is a change, explain how that change would happen.
Answers
Answer:The answer is A
Explanation:I hope u get a A+
Compare and contrast a fossil with a trace fossil
Answers
Definition:
- Fossil: A fossil refers to the preserved remains or traces of organisms that lived in the past. It can include the hard parts of plants or animals, such as bones, shells, teeth, or wood.
- Trace Fossil: A trace fossil, also known as an ichnofossil, refers to indirect evidence of prehistoric life activities, such as footprints, burrows, tracks, trails, or even feces (coprolites).
Formation:
- Fossil: Fossils form when the remains or hard parts of organisms are buried in sediment or other materials, undergo mineralization over time, and become preserved.
- Trace Fossil: Trace fossils form when an organism's activity or behavior, rather than the organism itself, creates an impression or trace that is preserved in the geological record.
Information Provided:
- Fossil: Fossils can provide direct information about the physical characteristics, anatomy, and structure of ancient organisms. They can offer insights into their evolutionary relationships, adaptations, and paleoenvironments.
- Trace Fossil: Trace fossils provide indirect information about the behavior, locomotion, feeding habits, and ecological interactions of ancient organisms. They can reveal details about their movement patterns, burrowing behavior, or group activities.
Preservation:
- Fossil: Fossils typically require specific conditions for preservation, such as rapid burial, anoxic environments, or mineral-rich sediment. They are often preserved in sedimentary rocks, amber, or ice.
- Trace Fossil: Trace fossils can form in various types of sediments, including mud, sand, or volcanic ash. They can also occur in hardened substrates like limestone or volcanic rock.
Types and Examples:
- Fossil: Examples of fossils include bones, teeth, shells, petrified wood, and preserved soft tissues like feathers or leaves.
- Trace Fossil: Examples of trace fossils include footprints, tracks, burrows, nests, feeding traces, or coprolites (fossilized feces).
In summary, a fossil refers to the preserved remains or traces of organisms themselves, providing direct information about their physical characteristics. On the other hand, a trace fossil refers to indirect evidence of prehistoric life activities, offering insights into behaviors, locomotion, and ecological interactions. Both types of fossils contribute to our understanding of ancient life forms and ecosystems, but through different perspectives and types of evidence.
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Allele frequency is a product of the environment and remains constant and never changes within a population over time?
A. True
B. False
Answers
Answer:You can search this up easily
Explanation:
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Why are Sunlight and nutrient levels asexual
Answers
Answer:Sexual reproduction allows them to produce fit offspring that can survive under stressed environmental condition
Explanation:Reproducing sexually and asexually allows fungi to adjust as per the environmental condition.
When the conditions are favorable, they reproduce asexually and increase their number but when the condition are not favorable and environmental selective pressure occur then they undergo genetic variation through sexual reproduction to produce a stable and fit offspring that could survive under stressed condition with limited resources.
Asexual reproduction Since there are plenty of resources, the plant will want to reproduce quickly and colonize the area
a model of a plane in different parts of atmosphere uses a scale of 1;4,000, if a plane flies at an altitude of 2,000 feet how high above ground level is the plane in the model
Answers
Answer:
The correct answer would be - 1/2 ft.
Explanation:
if the scale is 1:4,000
It shows that the model plane will fly 1ft above the ground., the original plane flyes 4,000ft above the ground,
Now, if the plane flies 2,000ft above the ground, this is half times as the scale given, then the model plane will also fly half times as the number from the scale.
1/2*1ft = 1/2ft.
Now, we also can do it as:
4000 ft equivalent to 1 ft.
2000ft equivalent to x
x = 1ft*(2000ft/4000ft) = 1ft*1/2 = 1/2ft.
which evolutionary mechanism is responsible for the change in the gene pool of the farmer's flock?
artificial selection
natural selection
sexual selection
gene flow
Answers
Select the correct answer.
Which of these activities increases the amount of carbon in the atmosphere?
Answers
please help fast. How do both systematics and taxonomy relate to phylogeny?
Answers
Answer: “ Systematics is concerned both with Taxonomy, the naming and classification of life, and Phylogeny, the science and study of understanding the family tree of all life on Earth. ... Systematics, then is the classification of life according to its phylogenetic (evolutionary) relationships.” -http://palaeos.com/systematics/
Systematic is related to the study of the evolution of a species over time and the relationship between them. Taxonomy is the naming and classification of animals and plants. The phylogeny is the study of family trees of every species on Earth, Hence they all are related to each other.
What is taxonomy?Taxonomy includes the study of naming and classifying animals and plants. By seeing the characteristic of a new organism, it is classified and put into kingdoms and groups.
Phylogeny and systematic are related to the evolutionary relationship between them, the family tree, and how an organism evolved over time.
Thus, Systematic has to do with the investigation of how a species changes over time and how they interact. The naming and categorization of plants and animals are known as taxonomy. Phylogeny is the study of family trees. These terms are related to each other.
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Which reading on the hydrometer would indicate a solution with greater buoyancy?
A) 1.000
B) 1.025
Answers
Answer:
1.025
Explanation:
The buoyant force is equal to the weight of the water displace. The hydrometer floats more in the denser liquids. The buoyancy force is usually 1.025 in the solution but it is increased if more pressure is exerted on the solution. The pressure of the fluid will increase from its depth.
explain the importance of all 3 biomolecules in general and for making ATP.
Answers
The three biomolecules that are used for making ATP are Lipids (fats) , Carbohydrates and Proteins
The biomolecules also known as biological molecules serve a wide range of activities and they vary in shape and their size . It is also considered essential to life because they help organisms develop, survive, and propagate. The biomolecules interact with one another which play a role in the development of organisms .
There are four types of biological molecules which are carbohydrates which is used as an energy source , lipids which is used for storage and support , proteins is used for supporting essential vital functions and amino acids are the developing elements that make up proteins and nucleic acids for storing genetic information .
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