D. A pond has 12 species of organisms including 300 animals and 40 plants
D. And, I need to fill in all the 20 letters so I'm gonna ramble
Answer:
DNA is known as the genetic material of all the organisms except some viruses. DNA is made of four nitrogenous bases, pentose sugar and the phosphate group.
1. Watson and crick meant that DNA shows the complementary base pairing in which adenine binds with thymine and cytosine binds with guanine. This base pairing has allowed the single DNA stranded to carry the information that are necessary for the synthesis of the complementary daughter strand.
2.The separation of the strand should be done in such a way that friends should get each single strand of DNA. The information stored in the DNA is available in the single strand of DNA.
<h2>Answer:</h2>
The option D is correct.
<u>B cells are memory producing cells.</u>
<h3>Explanation:</h3>
As B cells are the specific receptor cell, after immunity to certain infection of the foreign particle, there is a function of acquired immunity is the protection of the body from that particular infection for the whole life which is done by <u>memory cells of B lymphatics.</u>