Animals need various nutrients in order to live and grow. nitrogen, for example, is a nutrient that is needed to form molecules, such as dna and rna. how do animals obtain nitrogen?
a.
they create nitrogen in their bodies using other nutrients as building blocks.

b.
they eat plants which have absorbed nitrogen from the soil.

c.
they breathe in and absorb nitrogen gas from the atmosphere.

d.
all of these

B

Explanation:

Nitrogen is essential for all living things because it is a major part of amino acids, which are the building blocks of proteins and of nucleic acids such as DNA, which transfers genetic information to subsequent generations of organisms. About 78 percent of the atmosphere is made of nitrogen, but plants and animals can't take nitrogen directly from the air. A process called the nitrogen cycle makes this happen.

The answer is B. They eat plants which have absorbed absorbed nitrogen from the soil.

Explanation:

I just did this and that was the outcome:/ Hope it helps

the speed increase from w to x due to increased gravity force

the speed decreases from x to y due to decrease in gravity

you are certainly talking about this picture:

a: is the label of the white square, it is showing the  replication fork, formed by helicase (d) ==> so it is the site of dna separation and replication 

b: is a new dna brand that is following directly the replication fork, so it is continuous ==> built continuously from 5' to 3

c: dna polymerase cannot replicate dna on its own, it needs the of their proteins, and one of them plays the role of a clamp which fixes  the dna with the dna template and increases  the processivity of the enzyme. ==>   stops polymerase from falling off the  template.

d: is the enzyme responsible for forming the replication fork (helicase) ==> unwinds and separates dna into two strands

e: is the delayed strand, it is built  in the opposite sense of the helicase, so dna will be built in fragments ==> built  fragments from 5' to 3 joins

and finally f: is the enzyme that builds  the new dna strand (dna polymerase) ==>   adds nucleotides to make a new dna helix.

credit: gradman555p98x9p

read more on -