Question

1. what type of isolation occurs due to structural differences in reproductive organs? a. geographical isolation b. temporal isolation c. behavioral isolation d. mechanical isolation 14. lucy, a partial skeleton found in ethiopia, revealed a bipedal creature living approximately how many million years ago? a. 3.2 million b. 1.5 million c. 2.7 million d. 4.6 million 15. what does the termmolecular data refer to in phylogenetics? a. historical records of species b. information about the physical traits of organisms c. genetic information used to study evolutionary relationships d. data collected from environmental observations

Explanation:

1. Mechanical isolation occurs when there are structural differences in reproductive organs preventing successful mating.
2. The partial skeleton Lucy is estimated to be from a bipedal creature that lived about 3.2 million years ago.
3. In phylogenetics, molecular data refers to genetic information used to study evolutionary relationships.

Answer:

1. d. Mechanical isolation
2. a. 3.2 million
3. c. Genetic information used to study evolutionary relationships