Q3 Module 5 Patterns of Descent with Modification

Question 1

It is an isolation mechanism that prevent mating or successful fertilization

Answer 1

Pre-zygotic

Question 2

A post-zygotic isolation mechanisms that prevent the hybrid zygote from
developing into

Answer 2

Viable, infertile adult

Question 3

He described that species are group of interbreeding natural populations
that are reproductively isolated from other such as groups.

Answer 3

Ernst Mayr

Question 4

The following are mode of speciation EXCEPT:
A. Allopatric speciation C. Parophatric speciation
B. Sympatric speciation D. Exophatric speciation

Answer 4

Exophatric speciation

Question 5

Type of speciation with bodies of water and mountain ranges barrier

Answer 5

Allopatric speciation

Question 6

A post-zygotic isolation mechanism when hybrids are sterile because the sex organs develop abnormally

Answer 6

Hybrid sterility

Question 7

Hybrid breakdown happens when first generation hybrids are
normal, vigorous and viable but the second generation may be

Answer 7

Very weak or sterile individuals

Question 8

Post-zygotic isolation mechanisms are considered to
be speciation when they are

Answer 8

Barriers

Question 9

What is true about Sympatric speciation?
A. Gene flow occurs but with great distances is reduced.
B. It involves abrupt genetic changes that quickly lead to the
reproductive isolation of a group of individuals.
C. Become geographically separated from the other members thereby
preventing gene flow.
D. There is also abrupt change in the environment over a geographic
border and strong disruptive selection must also happen.

Answer 9

It involves abrupt genetic changes that quickly lead to the reproductive isolation of a group of individuals