Natural selection theories

Question 1

Natural selection acts directly on phenotypes, but evolution consists of changes in allele frequencies

Answer 1

flypaper traps lost their carnivorous function. flies stoped producing sticky mucus, then pitfall traps evovled, which allowed the hair like structures to get trapped.

Question 2

natural selection is not forward looking; it is a random process, selects among the variant traits already in the environment. the variant trait selected for is more likely to survive, only acts on variation that already exists. these come from mutation

Question 3

the pitfall and snap traps from fly paper is an example of

Answer 3

secondary adaptation, they loss a function and then gained one

Question 4

Exaptation

Answer 4

new function for an existing trait, like secretion on end of plants: existing trait
also caught insects: new function

Question 5

Natural selection does not lead to prefection (T or F)

Answer 5

true

Question 6

Natural selection is nonrandom, but not progressive (T or F)

Answer 6

true

Question 7

Natural selection acts on individuals but this is not for the good of the species (T or F)

Answer 7

true