Plants need certain bacteria to produce usable nitrogen compounds because:

Plants need bacteria to produce plant protein

There is no nitrogen in the soil

the bacteria produce the basic sugars needed as plant food

Plants cannot separate the nitrogen gas molecule into a usable element

Answer:

Plants cannot separate the nitrogen gas molecule into a usable element

Explanation:

Nitrogen is an essential element for plant growth and development, but it is present in the air as a gas (N2) that is not readily usable by plants. Nitrogen-fixing bacteria, such as rhizobia and cyanobacteria, can convert nitrogen gas into usable forms of nitrogen, such as ammonia and nitrates, through the process of nitrogen fixation. These nitrogen compounds can then be taken up by plants and used to synthesize amino acids, which are the building blocks of proteins, and other essential molecules.

2.Which of the following sequences is in the correct order to know the steps involved to test the
presence of starch in a leaf?
P - Boil the leaf in alcohol in a water bath.
Q - Add iodine solution.
R - Wash the leaf in water.
S - Boil the leaf in water.
(a) S, Q, R and P (b) P, S, Q and R
(c) Q, R, P and S (d) S, P, R and Q

How do I get the correct answer to this question? (Not graded))

Match each term to its description. Match Term Definition a Toxicology A) The study of the effects and treatment of poisons Lethal dose B) Amount that is about to kill 50 percent of the population c Effective dose C) The maximum amount that causes no visible or noticeable effects to a dose Threshold level D) Amount that causes some response in 50 percent of the population

Which of the following is NOT an organ system of the human body?

A. Epidermal
B. Respiratory
C. Digestive
D. Urinary

!20 POINTS!

Which behavior is an example of how animal communication helps a population survive?


A. A bird destroys another bird's nest so that it can nest in that spot.


B. Giraffes and zebras compete for water at the same watering hole.


C. Ants use their bodies to form a bridge that other ants can use to get to food.


D. A bee returns to the hive and shares the location of food with other bees.

Which statement about sex cells is correct?
Sperm are male gametes
Sperm are female gametes
Ova are male gametes

The force of gravity can be best described as a(n)
O experiment.
o hypothesis.
theory.
law.

How do the organs in the endocrine system work together?

The active site of an enzyme is damaged, leaving it nonfunctional.

How would this change to the enzyme's function be best described using the graph above?

CORRECT (SELECTED)
The reaction originally proceeded through the path of Y, but now proceeds through the path of X.

ANSWER QUICKLY PLEASE!!

Which level of organization is a group of similar cells that work together to perform a certain function

A. Molecule
B. Organ
C. Organ system
D. Tissue

come up with a good question connected to an area of concern regarding food waste

In 3-5 sentences, explain creative design. Help asap, please.

Is this the right one lmk!!!!

A similarly between the nervous system and the hormone-secreting system in humans is that they both

Genes are located on
A. dna
B. Proteins
C. Rna

Bio question please help

10
2 points
Which of the following is NOT used to classify climate types?
Temperature
Vegetation
Precipitation
Biodiversity
Previous

i begging you please help me

Theme . Anatomical and functional features of
TMJ at children depending of age. Clinical examination of patient with TMJ pathology, classification of diseases. Diseases of TMJ in children, clinical symptoms of acute and chronic diseases. Differential diagnostics, principles of treatment, prevention of diseases.

1. The clinical signs of MPD are following except:
A. teeth frequently have wear facets
B. daytime clenching or nocturnal bruxism.
C. range of mandibular movement may be decreased.
D. diffuse, poorly localized, preauricular pain..
E. crepitus, located directly over the TMG.

2. Radiographic appearance of DJD:
A. decreased joint space, surface erosions, osteophytes, and flattening of the condylar head.
B. radiographs of the tmjs are usually normal.
C. MRI images usually demonstrate anterior displacement of the disk.
D. erosive changes in the anterior and posterior aspects of the condylar heads.
E. irregular articular surfaces of the condyle and fossa, with varying degrees of calcified connection between these articulating surfaces.

3. Synovial fluid is a:
A. liquid of lymphatic systems
B. serous exudate from articular cavitas.
C. oral liquid which mixed blood lubricant.
D. filtrate of plasma that passes through fenestrations in the subendothelial capillaries.
E. secret of epithelial lining which covered articular surfaces.

4. Click occurring during the opening movement. It’s sign of:
A. disk displacement disorders.
B. mpd.
C. djd.
D. ankylosis.
E. acute infectious arthritis.

5. When the mandibular condyle translates anteriorly in front of the articular eminence and dislocations can’t be reduced may be necessary:
A. limitation of motion.
B. anesthesia of the auricular temporal nerve and the muscles of mastication.
C. using of stronger analgesics.
D. emg biofeedback and relaxation training, ultrasound, spray and stretch, and pressure massage.
E. occlusal splints.

6. Tricyclic antidepressants are administered in patient with:
A. systemic arthritic conditions.
B. acute arthritis.
C. anterior disk displacement without reduction.
D. degenerative joint disease.
E. mpd causing bruxism

7. The articular disc receives nutrition from:
A. intercellular space.
B. true vessels.
C. vessels of fibrous cartilage.
D. sinovial fluid. E. oral liquid.

8. By MPD the pain is a result of:
A. damage of articular disk
B. increased pressure in joint space.
C. abnormal muscular function or hyperactivity.
D. accumulate exudate in joint space.
E. articular surface flattening, erosions.

9. The pain syndrome in infectious arthritis of TMJ is result of:
A. increased pressure in joint space.
B. abnormal muscular function or hyperactivity.
C. damage of articular disk.
D. accumulate exudate in joint space.
E. articular surface flattening, erosions.

10. Etiologic factors suggested as contributing to the development of TMD are following except:
A. trauma.
B. immaturity of connective tissue structures.
C. occlusal factors.
D. parafunctional habits. E. posture.

11. Malocclusion associated with TMD is following:
A. all of above listed.
B. skeletal anterior open bite.
C. overjet greater than 6 to 7 mm.
D. retrocuspal position (centric relation) to intercuspal position (centric occlusion) slides greater than 4 mm.
E. unilateral lingual cross bite.

12. The muscles should be palpated for the presence of following features except:
A.spasm.
B. tenderness.
C. fasciculations.
D. fiber disruption
E. trigger points.

13. Normal range of movement of an adult's mandible is about:
A. 45 mm vertically (i.e., interincisally) and 10 mm protrusively and laterally.

B. 35 mm vertically (i.e., interincisally) and 15 mm protrusively and laterally.

C. 25 mm vertically (i.e.,
interincisally) and 10 mm protrusively and laterally.

D. 15 mm vertically (i.e., interincisally) and 15 mm protrusively and laterally.

E. 55 mm vertically (i.e., interincisally) and 20 mm protrusively and laterally.

5. For a plant, sunlight is an example of

Genetic variation can occur during meiosis because of the process of ________

1.crossing over

2.cell division

3.fertilization

inguinal lymph nodes are found in

Fred discovered a new organism. It is eukaryotic and multicellular, and it flies to get its food, which is a type of grass. Which kingdom does it belong in?
plants
fungi
archaebacteria
bacteria
animals
protists
need the answers quick

During a practical class of microscope handling a student did not see enough light what should the student check

When something is ___________, it’s determined by genetic factors and able to be passed from parents to their offspring. 21 points pls help me with the question.

A researcher wants to examine the effect of fertilizer and the effect of sunlight on the yield of tomatoes. She bought 60 tomato plants at local garden store. She randomly assigned 30 tomato plants to be planted on the sunny side of the hill and 30 to be planted on the shady side. The 30 plants which are planted on the shady side are randomly assigned to one of three groups. The first group are grown with no fertilizer, the second group with a small amount of fertilizer, and the third group with a large amount of fertilizer. The 30 plants which are planted on the sunny side are likewise randomly assigned to one of three group. The first group are grown with no fertilizer, the second group with a small amount of fertilizer and the third group with a large amount of fertilizer. All tomato plants are planed at the same time and are all treated alike (in terms of how they are watered, weeded etc.). Each plant is grown to maturity. The total weight of tomatoes obtained from each plant is recorded. Identify the factor(s) and the number of levels for each. a) Sunny, shady (2 levels) b) No fertilizer, small amount of fertilizer, large amount of fertilizer (3 levels) c) No fertilizer and sunny, small amount of fertilizer and sunny, large amount of fertilizer and sunny, no fertilizer and shady, small amount of fertilizer and shady, large amount of fertilizer and shady (6 levels) d) Fertilizer (3 levels), location (2 levels) e) Fertilizer (3 levels), blocking variable – location (2 levels)

Nondisjunction during meiosis can result in all of the following EXCEPT
Group of answer choices

cells abnormal numbers of sex chromosomes

cells with the normal number of chromosomes

cells with additional chromosomes

cells with missing chromosomes

Health science please helps thanks you

when is mitosis complete​?

which of the following is the first step perfomed after the blood colection bag is filled during a plasma collection?

PLSS HELP I NEED THIS!!!
Which of the following is an impact characteristic of communities
A. Composition and structure constantly changes
B. Composition and structure remain constant
C. Communities are static in nature
D. All individuals grow at the same rate