Exam 4 - Paleobiology, Human Evolution, Population Ecology, Community Ecology, Biodiversity, & Animal Behaivor Flashcards Preview

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Flashcards in Exam 4 - Paleobiology, Human Evolution, Population Ecology, Community Ecology, Biodiversity, & Animal Behaivor Deck (30):
1

Mammals evolved from a major lineage of amniotes called synapsids.

True

2

Microtektites represent:

part of the debris associated with an asteroid impact

3

Which of these examples is not an atavism?

a platypus laying an egg

4

In the evolution of the tetrapod limb, the stylopod element evolved before the autopod element.

True

5

The external gills on the Mexican axolotl are an example of peramorphosis.

False

6

Three of the major characteristics of placental mammals are hair, mammary glands, and live births. Of the three, mammary glands evolved last.

False

7

Mousterian stone tools are associated with:

Neanderthals

8

Sphecomyrma is a transitional fossil in the evolution of:

ants

9

The species represented by “Turkana boy” was fully bipedal and lived approximately:

1.6 to 1.8 million years ago

10

Which combination of characters best describes the genus Paranthropus:

small brain, very large teeth, facultative bipedalism

11

Deliberately shaped or flaked stone tools have been made by various Homo species:

since about 40,000 years ago

12

Which of these traits is most strongly associated with the evolution of bipedal locomotion and upright posture?

a downward repositioning of the foramen magnum

13

The net replacement rate, R0, is calculated as:

the sum of age-specific survival times age-specific fecundity for each age class

14

A factor that regulates a population is generally one that:

acts in a positively density-dependent way

15

Which of the following is not evidence of an asteroid impact at the end of the Cretaceous?
shocked quartz
a crater 180 km wide
these are all evidence of an asteroid impact
an enriched iridium layer
a crater dated to be about 200 million years old

a crater dated to be about 200 million years old (its 64 million)

16

All anthropoids have stereoscopic, trichromatic color vision.

False

17

Pisaster sea stars were considered a keystone species because:

their removal greatly reduced species diversity

18

Which term represents the gathering of vital statistics to determine population growth?

demography

19

What single factor accounts for most of the variation in skin pigmentation among indigenous peoples around the world?

ambient ultraviolet radiation

20

Which of the following organisms is the closest relative of the gibbon?

human

21

The logistic model of population growth predicts that, as N increases and gets closer to K:

none of these answers is correct

22

A population will grow if its net replacement rate, R0, is greater than zero.

False

23

A survivorship curve that first rises steeply and then drops at later ages is:

impossible

24

The sum total of an organism's interaction with the biotic and abiotic resources in its environment would represent its:

niche

25

Which transitional fossil helps to illustrate the gradual evolution of the tetrapod limb?

Tiktaalik

26

What are the typical coalescent times of total genetic diversity in the global human population?

250,000 years

27

Based on the following life table, this population:


Age class lx mx

0-1 1.0 0

1-2 0.3 1

2-3 0.2 3

3-4 0.1 1

is stable

28

The fundamental niche must be bigger or the same size as the realized niche.

True

29

Certain mite species feed on nectar and are transported from flower to flower via the nostrils of hummingbirds. Because mites neither harm nor benefit hummingbirds, this interaction is described as:

Commensalism

30

Place these transitional fossils in the correct temporal order, from oldest (earliest) to youngest. Remember what each one represents:

Acanthostega, Morganucadon, Basilosaurus, Ardipithecus