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Anna71 [15]
3 years ago
7

A student designed an experiment to determine if air temperature had an effect on the rate of photosynthesis in corn plants. A c

onstant in this experiment is the
A.Air temperature at which the corn plants were grown
B.Amount of carbon dioxide used by the corn plants
C.Volume of oxygen produced by the corn plants
D.Number of corn plants used
Biology
1 answer:
vredina [299]3 years ago
6 0

Answer:

D. is the answer

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Which factors can prevent permanent fixation of an allele (i.e. maintain genetic diversity)? Hint: You're going to have to try d
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Answer:

The answer is Genetic drift and natural selection.

Explanation:

Genetic drift is a change is genetic composition that enhances organisms adaptation to an environment. The continuous change gives an extra advantage and enhances better chances of survival

Natural selection is the process that results in the adaptation of an organism to its environment by relatively reproducing its genes.

This two factors are the major factors that like causes allele fixation

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Arrange these groups in the order that they first appear: birds, reptiles, amphibians, dinosaurs, fish.
a_sh-v [17]
Try, Dinosaurs, birds. fish, reptiles. amphibians.
7 0
3 years ago
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The function of antibodies is to A. inject toxins into living pathogens. B. mark pathogenic cells for destruction. C. act as Tol
Liono4ka [1.6K]

Answer:

Mark pathogenic cells for destruction. (Ans. B)

Explanation:

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Antibodies also help to mark pathogens for destruction by the help of macrophages or neutrophils and they are known as phagocytic cells because they are highly excited to macro-molecules complexed with antibodies.

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