Exam 1

Front 1

Mission Statement

Back 1

The mission of Weatherford College is to provide quality learning opportunities and effective programs that serve the need of our students and the citizens of our service area.

Front 2

A group that consists of all the evolutionary descendants of a common ancestor is called a(n)

Back 2

clade

Front 3

A synapomorphy is

Back 3

A shared derived characteristic

Front 4

Which of the following would not be expected to result in homoplasy?

Back 4

The inheritance of ancestral trait.

Front 5

A derived trait is one that

Back 5

differs from its ancestrial form

Front 6

Which of the following statements about reconstructing phylogenies is false?

Back 6

Shared traits are generally assumed to be homoplastic until they can be proven to be homologous.

Front 7

The most important limitation of fossils as a source of information about evolutionary history is that

Back 7

the fossil record for many groups if fragmentary of even nonexistent.

Front 8

Which source of molecular data would be most helpful for a study of the evolutionary relationships of closely related animal species?

Back 8

Mitochondrial DNA

Front 9

Which of the following statements about the use of molecular clocks in phylogenetic analysis is true?

Back 9

Molecular clocks must be calibrated using independent data, such as the fossil record.
and
Even in a group of closely related species, it has been found that different genes evolve at different rates

Front 10

A soil sample contains large numbers of ROD- SHAPED BACTERIA. The bacteria are referred to as

Back 10

bacilli

Front 11

The dense FILMS laid down by many prokaryotes are

Back 11

biofilms

Front 12

Gram-negative bacteria stain pink because

Back 12

their peptidoglycan layer is thin.

Front 13

A bacterium that requires a carbon source other than carbon dioxide, yet can convert light energy to chemical energy, is called a

Back 13

photoheterotroph

Front 14

A bacterium that cannot live in the presence of oxygen is called

Back 14

OBLIGATE ANAEROBE

Front 15

Biofilms

Back 15

are examples of complex communities that prokaryotes may form and can protect bacteria from attack by the immune system.

Front 16

Peptidoglycan

Back 16

is present in the cell walls of almost all bacteria.

Front 17

Which means of locomotion is not used by prokaryotes?

Back 17

Beating cilia

Front 18

Bioluminescence

Back 18

can be bright enough to be detected from space.

Front 19

Which of the following types of prokaryotes are most sensitive to oxygen?

Back 19

Obligate anaerobes

Front 20

Which of the following classes of organisms is dependent of organic molecules as both the source of energy and carbon?

Back 20

Chemoheterotrophs