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

Biology

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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