How can geography lead to reproductive isolation? Choose the correct answer.
Group of answer choices

A-Some populations may have a milder habitat than other populations.

B-Subspecies may choose to occupy different areas for competitive reasons.

C-Extremes of temperatures may reduce the breeding opportunities for some.

D- A physical barrier may arise and separate a population, preventing interbreeding.

answer: 4

explanation: 8

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.

the correct answer is d