AnswersCMS 2026-2027 Biology CREDIT RECOVERYNatural Selection and Evolution

Natural Selection and Evolution — Test Answers

25 verified answers1 views
21
Free Preview

In a cladogram, when does a group of organisms branch off?

A
when a new trait evolves
B
when it is discovered
C
when an ancestor becomes extinct
D
when it becomes large enough
22
Free Preview

Which best describes horse breeding?

A
Different horse and pony breeds are an example of overcompetition.
B
Selective pressure in nature has resulted in different horse and pony breeds.
C
People have manipulated the genome of horses and ponies in the lab to produce the breeds we know today.
D
People have selected the most desirable natural traits to produce different horse and pony breeds.
23

Why are the Miller-Urey experiments essential to the theory of evolution?

A
They showed that electricity can create life.
B
They showed how organic molecules could be made from Earth's early atmosphere.
C
They showed that life can only come from life.
D
They showed the role that natural selection played in the evolution of modern day organisms.
24

Which of these is an example of reproductive isolation?

A
two populations of salamanders that live in different lakes
B
two populations of salamanders that have different tail lengths
C
two populations of finches that cannot produce viable offspring
D
two populations of finches that have different feather colors
25

A biology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. Which is the least supportive example?

A
antibiotic resistance in bacteria populations
B
pesticide resistance in garden insects
C
changes in the color of the peppered moth population in England
D
changes in genetics in human populations

Did you find these answers helpful?

More from this Course

Quiz
25 verified answers

Test

Quiz
25 verified answers

Test

Quiz
25 verified answers

Test