BIOS 1073 Unit 1 Review (Ch 23-25)

Question 1

Which type of natural selection is represented in graph B?

Accepted Answer

Disruptive

Question 2

Morphological differences prevent the successful completion of mating in this type of reproductive isolation............

Accepted Answer

Mechanical isolation

Question 3

Which type of reproductive isolation occurs when the sperm of one species cannot fertilize the egg of another species?

Accepted Answer

Gametic isolation

Question 4

What type of genetic drift changes the allele frequencies in a population due to a sudden reduction in population size?

Accepted Answer

Bottleneck effect

Question 5

Land was colonized by fungi, plants and animals _________________.

Accepted Answer

500 million years ago

Question 6

Similarities in which structures found in prokaryotes and mitochondria supports the Endosymbiont Theory?

Accepted Answer

both of them

Question 7

Carbon-14 has a half life of 5700 years. If a sample contains 1/4 of Carbon-14, how old is the sample?

Accepted Answer

11,400 years old

Question 8

Which type of reproductive isolation occurs because the organisms mate a different times of the day?

Accepted Answer

Temporal isolation

Question 9

The Endosymbiont theory explains the evolution of ____________.

Accepted Answer

eukaryotes

Question 10

The Eukaryotes appeared AFTER the accumulation of oxygen in the atmosphere.

Accepted Answer

True

Question 11

The Endosymbiont Theory states that the Golgi apparatus was once a prokaryote living inside a eukaryote.

Accepted Answer

False

Question 12

What determines evolutionary "fitness" in an environment?

Accepted Answer

The ability to pass on your traits to the new generation

Question 13

Which concept uses the criteria of reproductive success to define a species?

Accepted Answer

Biological species concept

Question 14

The first eukaryotes appeared on this earth ________________.

Accepted Answer

1.8 Billion years ago

Question 15

Carbon-14 has a half life of 5700 years. If a sample is 34,200 years old, how many half lives has passed?

Accepted Answer

6

Question 16

Which event happened first on the Geologic Timeline?

Accepted Answer

prokaryotes appeared

Question 17

Fertilization occurs, but the hybrid of the two species is sterile in this type of reproductive isolation...........

Accepted Answer

Reduced Hybrid Fertility

Question 18

Which type of natural selection favors the middle variation and negatively selects the two extreme variations?

Accepted Answer

Stabilizing

Question 19

If p=.6 and q=.4 for a population of 100 cows, what would be the expected number of Red Cows (RR) ?

Accepted Answer

36

Question 20

Which condition would lead to a population being in Hardy-Weinberg equilibrium?

Accepted Answer

Random mating

Question 21

Which type of speciation mechanism blocks fertilization from occuring?

Accepted Answer

Prezygotic barriers

Question 22

Which event(s) would lead to adaptive radiation?

Accepted Answer

both of them

Question 23

From the case study, what was theorized to be the major positive selection for darker pigmentation at the equator?

Accepted Answer

prevent the breakdown of folic acid

Question 24

From the case study, what was theorized to be the major positive selection for lighter pigmentation at higher latitudes?

Accepted Answer

increased synthesis of vitamin D

Question 25

For 200 flowers, if you have 50 Red (RR), 120 Pink (Rr) and 30 White (rr), the frequency of the R allele is ?

Accepted Answer

.55

Question 26

Which type of natural selection is represented by graph A?

Accepted Answer

Directional

Question 27

Over time, the body size of the iguana decreases due to selective pressure from predators, it would cause ____________.

Accepted Answer

Directional selection

Question 28

According to the Biology of Skin Color case study, the further away from the equator, the level of pigmentation ______.

Accepted Answer

decreases

Question 29

Which of the following would NOT cause genetic variations?

Accepted Answer

cloning

Question 30

According to the Biology of Skin Color Case Study, the further away from the equator, the skin reflectance __________ .

Accepted Answer

increases

Question 31

Which procedure for dating fossils could be done using the following sample?

Accepted Answer

Relative dating

Question 32

Natural selection will favor the traits that are ________ fit to survive in the environment.

Accepted Answer

most

Question 33

Which of the following types of reproduction isolation is a prezygotic barrier?

Accepted Answer

Gametic isolation

Question 34

In the Hardy-Weinberg equation, what does the 2pq represent?

Accepted Answer

Heterozygous

Question 35

Which sympatric speciation results from the presence of extra sets of chromosomes due to mistakes in cell division?

Accepted Answer

polyploidy

Question 36

Which of the following CANNOT be used as evidence that the population is evolving?

Accepted Answer

allele frequency is constant

Question 37

This type of speciation occurs when the population is divided geographically and the gene flow is interrupted.

Accepted Answer

allopatric speciation

Question 38

This type of speciation takes place in geographically overlapping populations.........

Accepted Answer

Sympatric speciation

Question 39

A population is in Hardy-Weinberg Equilibrium if the predicted and actual allele frequencies are _____________.

Accepted Answer

equal

Question 40

Genetic Variation must be present in a population in order for evolution to occur.

Accepted Answer

True

BIOS 1073 Unit 1 Review (Ch 23-25)

Questions 40

BIOS 1073 Unit 1 Review (Ch 23-25)

Questions 40