Question

1. what do phylogenetic trees illustrate?

a. the anatomical similarities among different species
b. the fossil records of ancient organisms
c. the geographical distribution of species
d. the evolutionary relationships between species based on genetic characteristics

1. what defines extinction? (select all)

a. the temporary disappearance of a species
b. last individual of a species dying
c. reversible process caused by climate changes
d. irreversible loss of a species

1. genetic drift primarily occurs in which type of population?

a. highly diverse populations
b. smaller populations
c. large populations
d. stable populations

Explanation:

• For question 22, phylogenetic trees show the evolutionary relationships between species using genetic characteristics. They are not about anatomical similarities, fossil - records, or geographical distribution primarily.
• For question 23, extinction is defined as the last individual of a species dying and the irreversible loss of a species. It is not a temporary disappearance or a reversible process.
• For question 24, genetic drift has a more significant impact and primarily occurs in smaller populations as random events can have a greater effect on allele frequencies.

Answer:

1. d. The evolutionary relationships between species based on genetic characteristics
2. b. Last individual of a species dying; d. Irreversible loss of a species
3. b. Smaller populations