Answer:
The correct answer is - Cytosine pairs with guanine and thymine pairs with adenine.
Explanation:
In a real DNA or B-DNA the interaction or arrangement of the nitrogen bases are defined and almost remain the same. The bond between the nitrogen bases is hydrogen bonds.
The hydrogen bond between the purine and pyrimidines (types of nitrogen bases) are as follows:
Adenine always pairs with Thymine and Guanine always pairs with Cytosine in a real DNA molecule.
The statement that best explains the reason for the general trend in hominid evolution that occurred over millions of years is that; Hominids evolved to walk upright on their hind limbs, reducing the need for opposable toes. Hominids are the members of the family Hominidae; which includes humans and the great apes. There has been a continuous evolution in this class from the first hominids to the current human, which has seen a lot of change from the foot, the brain capacity, activities involved, among other features.
Answer:
The correct answer is b. actors have to be more likely to carry the altruistic allele than non actors.
Explanation:
Altruism is the behavior by an organism that benefits other organisms by costing its own fitness. The actor is the individual who is doing altruism and the recipient is the individual who is getting benefited by the actor's altruism.
An example of altruistic behavior can be seen in animal kingdom easily. Vampire bats give blood to those members of the community who were not able to go for search for blood show altruistic behavior.
Actors have altruistic genes that suggest them to behave altruistically. Non-actors may not contain alleles of altruism but the recipient might have altruistic alleles.
Hamilton's rule says that natural selection will favor the altruistic allele when rb > c.
where r = coefficient of relatedness between donor and recipient
b = benefit received by recipient and
c = cost paid by altruist.
Therefore, the correct answer is b.