QUESTION 1 Many of the boundaries of the geological time periods are defined by ______.

The formation of new species

Mass extinctions

Every 1.25 billion years marks a new boundary.

Only a and b

Only b and c

2 points

QUESTION 2

Which of the following statements is true regarding microevolution?

Changes in a population over time.

Small changes in alleles.

Large changes resulting in a new species from a common ancestor.

Only a and b

Only a and c

2 points

QUESTION 3

A normal gene that can be altered by a mutation.

Metastatic tumor

Benign tumor

Malignant tumor

Oncogene

Pro-oncogene

2 points

QUESTION 4

The ____ is the protein coat that surrounds the genetic material of a virus.

Viral envelope

Sheath

Capsid

Viroid

Capsule

2 points

QUESTION 5

The HIV virus contains _____ and _______.

DNA, reverse transcriptase

RNA, ribosomes

DNA, RNA

RNA, reverse transcriptase

2 points

QUESTION 6

The bacterial chromosome has several origins of replication that become initiation sites for the enzymes required for DNA replication.

True

False

2 points

QUESTION 7

Zika is a virus that is spread by a species of mosquito that is active during the daytime. The virus is known to cause microcephaly in some unborn children.

True

False

2 points

QUESTION 8

Gel electrophoresis can separate DNA fragments base of on all the following EXCEPT

Electrical charge

Size / length

Mass

All the above

0nly b and c

2 points

QUESTION 9

Gene regulation is necessary in eukaryotic cells for ___.

Conservation of energy

Cell differentiation

Growth

Development

All the above

2 points

QUESTION 10

Polymerase Chain Reaction is a type of technology used in the laboratory to produce multiple copies of DNA from a very small sample of DNA.

True

False

2 points