Bio Unit 1/quiz 4

Front 1

Australia and Eurasia each have a mouse-like mammal, one a marsupial, the other a placental. This is an example of

Back 1

convergent evolution

Front 2

If we were to discover beings on a distant planet that looked very much like us, it would probably be cited as an example of

Back 2

convergent evolution

Front 3

Carbon 14 (14C)

Back 3

can be used to determine the age of organic material in a fossil

Front 4

if the F2 generation illustrates a lack of fitness, this is an example of

Back 4

hybrid breakdown

Front 5

hybridization and polyploidy led to the evolution of

Back 5

common bread wheat

Front 6

the _____________ species emphasizes populations that share a recent evolutionary history

Back 6

phylogenetic

Front 7

Darwin's idea was that all species arose through "descent with modification" like a:

Back 7

tree, showing the branching of species from each other

Front 8

____________ occurs when distantly related organisms evolve similar adaptations to similar environments

Back 8

convergent evolution

Front 9

Wood and bone fragments found intact in sediments can be accurately aged using

Back 9

Carbon-14

Front 10

Which of the following statements about the evolution of horses is false?

Back 10

the evolution of the horse is characterized by a smooth pattern of increasing size across species

Front 11

Which of the following mechanisms could lead to allopatric speciation?

Back 11

all of the choices are correct:

advancing glaciers, rearrangement of coastal islands by a hurricane, the shrinking of a lake, disconnecting it from other bodies of water, uplifting mountains

Front 12

tetrapod digits are known to be

Back 12

controlled by genes that were present in the common ancestor of sharks

Front 13

Which of the following is an important chromosomal alteration separating humans from other primates?

Back 13

humans have a diploid chromosome complement of 46 compared to 48 in other primates

Front 14

the biological species concept relies primarily on the ability of individuals within the species to

Back 14

produce fertile offspring when mating with one another

Front 15

an example of mechanical isolation would be

Back 15

two organisms that are pollinated by different insects

Front 16

The function of the homeobox sequence of Hox gene is to

Back 16

all of the choices are correct:

serve as a toolkit gene, encode a homeodomain that functions as a transcription factor, produce a DNA-binding protein that activates or represses a downstream gene, specify where on the body appendages will develop

Front 17

The "sixth mass extinction" refers to

Back 17

the rapid loss of biodiversity due to degradation of the environment by humans

Front 18

Which group of animals represents the surviving dinosaurs?

Back 18

birds

Front 19

A paleontologist estimates that when a particular rock formed, it contained 12 mg of the radioactive isotope potassium-40, which has a half life of 1.3 billion years. The rock now contains 3 mg of the isotope. About how old is the rock?

Back 19

5.2 billion years

Front 20

when geographic variation occurs among the members of a species, individuals

Back 20

may be mistaken for separate species

Front 21

the fourteen species of finch native to the Galapagos Islands

Back 21

evolved from a single common ancestor

Front 22

hybrid inviability occurs when

Back 22

a zygote formed by two different species dies as an embryo

Front 23

what is the effect of a prezygotic isolating mechanism

Back 23

it prevents members of two different species from successfully conceiving a zygote

Front 24

pigs have feet with toes that do not touch the ground. These are examples of

Back 24

vestigial structure

Front 25

Which is likely result of a mass extinction

Back 25

create "empty niche space" that can stimulate radiation of surviving groups