Unit 2 misc

Question 1

Name 3 examples of taxonomic groups

Answer 1

nematodes, arthropods and chordates

Question 2

Describe variation

Answer 2

Source is mutation
Most are harmful or neutral
Some are beneficial to fitness of individual

Question 3

Describe natural selection

Answer 3

Populations produce more offspring than the environment can support
Individuals with variations that are better suited to their environment survive longer and produce more offspring
These individuals pass on advantageous alleles to next generation
Non-random increase in the frequency of advantageous alleles and non-random increase in frequency of deleterious alleles

Question 4

Sexual selection

Answer 4

The non-random process where alleles are selected that increase the individuals chances of mating and producing offspring

Question 5

Co-evolution

Answer 5

The process by which two or more species in a close relationship evolve in response to the selection pressures imposed by each other