Using the image below, identify which of the statements is true.

a. in part a the cell is 2n, and in part b the cell is 4n.

b. all of the above are true.

c. part a in the image is the chromosome before s phase of interphase, and part b is after dna replication has occurred.

d. the image shows a homologous pair chromosome 4 in part a, and sister chromatids in part b.

B. All of the above are true

Explanation:

I do PACyber as well and also got stuck on this one. After the test I saw that B was correct.

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.