Week 6

Question 1

Natural Selection

Answer 1

Results of different rates of reproduction, often acts through survival

Question 2

Sexual Selection

Answer 2

Natural selection that acts through access to mates

Question 3

Natural selection including sexual selection

Answer 3

The only known mechanism that drives the evolution of adaptions

Question 4

Genetic drift

Answer 4

Change in allele frequency due to chance

Question 5

The kind of process that evolution by natural selection is

Answer 5

An opportunistic process

Question 6

Mutation, natural selection and genetic drift all explain

Answer 6

Descent with modification

Question 7

Speciation

Answer 7

The evolution of reproductive isolation within an ancestral species

Question 8

Speciation is often gradual

Answer 8

After many generations

Question 9

Species: biological species concept

Answer 9

A group of organisms that can potentially interbreed successfully

Question 10

The 2 or more descendent species are

Answer 10

Geographic isolation, independent evolution and gradual reproductive isolation

Question 11

Organisms may be categorized by

Answer 11

Nutrition and by types of reproduction

Question 12

Autotrophs

Answer 12

Obtain carbon from carbon dioxide

Question 13

Heterotrophs

Answer 13

Obtain carbon from organic molecules

Question 14

Phototrophs

Answer 14

Obtain energy from light

Question 15

Chemotrophs

Answer 15

Obtain energy from chemical reactions

Question 16

Photoautotrophs

Answer 16

Obtain carbon from carbon dioxide and energy from the light

Question 17

Chemoautotrophs

Answer 17

Obtain carbon from carbon dioxide and energy from chemicals

Question 18

Photoheterotrophs

Answer 18

Obtain carbon from organic molecules and energy from the light

Question 19

Chemoheterotrophs

Answer 19

Obtain carbon from organic molecules and energy from chemical reactions

Question 20

Sexual

Answer 20

Haploid cells (aka gametes) fuse to form a zygote