Chapter 24 origin of species

Question 1

What is speciation

Answer 1

The process by which one species splits into two or more species

Question 2

It is microevolution

Answer 2

Changes over time in allele frequencies in a population

Question 3

What I s macro evolution

Answer 3

The broad pattern of evolution over long time spans

Question 4

Is morphology

Answer 4

Body form

Question 5

What is the biological species concept

Answer 5

Primary definition of species

Question 6

What is species

Answer 6

Group of populations whose members have the potential to interbreed in nature and produce viable fertile offspring but do not produce viable fertile offspring with members of other such groups

Question 7

What Is Gene flow

Answer 7

Transfer of alleles between populations

Question 8

What Does Gene flow have the potential to do

Answer 8

To hold the gene pool of the species together

Question 9

What is reproductive isolation

Answer 9

The existence of biological factors or barriers that impede members of two species from producing viable fertile offspring

Question 10

What are hybrids

Answer 10

Offspring that results from interspecific meeting

Question 11

What are pre-zygotic barriers

Answer 11

BeFore the zygote block fertilization from occurring

Question 12

What are Postzygotic barriers

Answer 12

After the zygote may contribute to reproductive isolation after the hybrid zygote is for

Question 13

What are the pre-zygotic barriers that impede meeting or hinder fertilization

Answer 13

Habitat isolation temporal isolation behavioral isolation and mechanical isolation and Gametic isolation

Question 14

What are the post zygotic barriers that prevent a hybrid zygote From developing into a viable fertile adult

Answer 14

Reduced hybrid viability. Reduced hybrid fertility and hybrid breakdown

Question 15

What is the morphological species concept

Answer 15

It characterizes a species by body shape and other structural features

Question 16

What is the ecological species concept

Answer 16

Views a species in terms of its ecological niche the sum of how members of the species interact with the nonliving and living parts of the environment

Question 17

What is phylogenetic species concept

Answer 17

Defines the species as the smallest group of individuals that share common ancestor

Question 18

What is allopatric speciation

Answer 18

Gene flow is interrupted when a population is divided into geographically isolated subpopulations

Question 19

What is sympatric speciation

Answer 19

Is small population becomes a new species without geographic separation

Question 20

What is polyploidy

Answer 20

Species that may originate from an accident during cell division that results in extra sets of chromosomes

Question 21

What is auto polyploid

Answer 21

It is an individual and has more than two chromosome sets that are all derived from a single species

Question 22

What is allopolyploid

Answer 22

When a sterile hybrid is a fertile polyploid

Question 23

What else can sympatric specification be affected by

Answer 23

Habitat differentiation sexual selection

Question 24

What is a hybrid zone

Answer 24

THe region in which members of different species meet and mate producing at least some offspring of mixed ancestry

Question 25

What Are the three possible outcomes for hybrids

Answer 25

Reinforcement or fusion or stability

Question 26

What is reinforcement

Answer 26

Reducing the formation of unfit hybrids in thus forcing reproductive barriers
Hybrids may cease to be formed

Question 27

What is fusion

Answer 27

The weakening of reproductive barriers

Question 28

What is stability

Answer 28

Hybrids continue to be produce

Question 29

What is punctuated equilibria

Answer 29

To describe these periods of a peristasis punctuated by sudden change