Watson and Crick's model explained mutability because bases pairs can suffer changes (mutations) during DNA replication. Moreover, this model also explained stability because DNA strands are held together by hydrogen bonds.
Deoxyribonucleic acid (DNA) is a double helix molecule composed of two long chains of four types of nucleotides, each containing one different nitrogenous base, i.e., Adenine, Guanine, Cytosine and Thymine.
In Watson and Crick's model, both DNA strands are held together by hydrogen bonds between nitrogenous bases on opposite DNA strands, thereby providing stability to the DNA molecule.
In DNA, Guanine always pairs with Cytosine by three hydrogen bonds, while Adenine always pairs with Thymine by two hydrogen bonds.
Moreover, Watson and Crick suggested that mutations could occur as a consequence of a base occurring very infrequently in one of the less likely tautomeric forms during DNA replication, thereby also explaining the mutability of life.
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Answer:
Option B, Adults out competing offspring for resources
Explanation:
In a symbiotic relationship two species/organisms live together in a mutual relationship in which either
a) Both of the species get benefitted
b) One of the species get benefitted and the other species get harmed
c) One of the species get benefitted and the other species is neither harmed nor benefited.
In this case , the worm with in the cow's body get benefited while the cow herself gets harmed as her food is stolen.
Hence, option B is correct.
Answer:
its like a quadrant.
Explanation:q4 ,same thing but negative.
