Which organisms are most closely related? remember, the name of an organism is in the form genus species.

a. turdus migratorius and strongylocentrotus purpuratus
b. vicia faba and ricinus communis
c. aythya affinis and aythya marila
d. litoria fallax and homo habilis

Ans. (C). Aythya affinis and Aythya marila

The scientific name of an organism consists two words, out of which the first word represents genus and the second word represents species of that organism.

According to the classification, there are seven levels of classification from least to most closely related, which include kingdom, phylum, class, order, family, genus, and species.

Organisms Aythya affinis and Aythya marila belong to a common genus (Aythya), and thus, they are most closely related to each other as compared to other given groups.

Thus, the correct answer is option (C).

one of the most common forms of pain or discomfort we feel during strenuous exercise is a burning sensation in our lungs or muscles that goes away shortly after we cease the activity. this is caused by a build-up of lactic acid.

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.