Chapter 13.1

Question 1

All humans belong to the same _____ but not the same ______.

Answer 1

genus

species

Question 2

Linnaeus coined the binomial name ___ _____ to describe the human species.

Answer 2

Homo sapiens

Question 3

Modern human species is known as ___ ____ ____.

Answer 3

Homo sapiens sapiens

Question 4

A species is defined as a group of individuals that can interbreed and produce fertile offspring but cannot reproduce with members of other species. This is an example of the _____ _______ ______.

Answer 4

Biological species concept

Question 5

Different forms of a gene that exist are known as ______ of the gene.

Answer 5

alleles

Question 6

A lion and leopard are the same ____ different _____.

Answer 6

genus

species

Question 7

Scientists refer to the sum total of alleles found in all the individuals of a species as the species _____ _____.

Answer 7

gene pool

Question 8

The spread of an allele throughout a species’ gene pool is called _____ _______.

Answer 8

gene flow

Question 9

gene flow can take two forms
1.
2.

Answer 9

pre-fertilization

post-fertilization

Question 10

Pre-fertilization prevent fertilization from occurring.

Answer 10

True

Question 11

Post-fertilization barriers Fertilization occurs but hybrids cannot reproduce.

Answer 11

True

Question 12

An example of interspecies hybrid is the cross between a horse and a donkey resulting in a

Answer 12

mule

Question 13

Hybrid ______ often occurs because hybrid individuals cannot produce viable sperm or egg cells.

Answer 13

sterility

Question 14

The evolution of one or more species from an ancestral form is called

Answer 14

speciation

Question 15

all humans belong to the same biological species

Answer 15

true

Question 16

The establishment of a new population far from an original population may lead to the evolution of several new species is a process known as

Answer 16

adaptive radiation

Question 17

Populations that are isolated from each other by distance or a barrier are known as

Answer 17

allopatric

Question 18

Separation between the gene pools of two populations may occur even if the populations are living near each other meaning that they are

Answer 18

sympatric

Question 19

The mating period between apple maggot flys and hawthorn flies differ resulting in little _____ _____ between them.

Answer 19

gene flow

Question 20

Darwin assumed that speciation occurred over millions of years was tiny changes gradually accumulated is known as

Answer 20

gradualism

Question 21

Biologists do not agree on a standard definition of ______ _____.

Answer 21

biological race

Question 22

Describes races as populations of a single species that have diverged form each others as a result of isolation of their gene pools

Answer 22

biological race