Biology 9th Chap 10 : Topic 3 - Maryam Publications

Biology Chapter 10 : Topic 3

Speciation

1 / 15

Speciation is the process by which:

A) An organism grows in size

B) Cells divide by mitosis

C) New species are formed from existing species

D) Organisms become extinct

2 / 15

Speciation occurs when populations of the same species become:

A) More similar genetically

B) Dependent on each other

C) Larger in number

D) Reproductively isolated from each other

3 / 15

Which factor can lead to speciation?

A) Isolation

B) Genetic variation

C) Natural selection

D) All of the above

4 / 15

A river separates a population of animals into two groups. Over many generations they become different species. This is mainly due to:

A) Digestion

B) Photosynthesis

C) Respiration

D) Geographic isolation

5 / 15

The first step in many cases of speciation is:

A) Isolation of populations

B) Pollination

C) Extinction

D) Fertilization

6 / 15

During speciation, differences accumulate because of:

A) Cell division alone

B) Identical environments only

C) Lack of reproduction

D) Genetic variation and natural selection

7 / 15

Two populations can be considered different species when they:

A) Eat different food

B) Live in different habitats only

C) Cannot interbreed to produce fertile offspring

D) Have different colors

8 / 15

Which statement best describes speciation?

A) Formation of new organisms by cloning

B) Classification of organisms

C) Formation of new cells

D) Evolutionary process resulting in new species

9 / 15

If members of two populations can no longer mate successfully, this indicates:

A) Mitosis

B) Homeostasis

C) Speciation may have occurred

D) Photosynthesis

10 / 15

Natural selection contributes to speciation by:

A) Eliminating all variation

B) Preventing reproduction

C) Favoring different adaptations in different environments

D) Producing identical offspring

11 / 15

Which of the following is most likely to cause geographic isolation?

A) Formation of a mountain range

B) Cell division

C) Pollination

D) Fertilization

12 / 15

Speciation increases:

A) Chromosome number in every organism

B) Biodiversity

C) Extinction rate only

D) Cell size

13 / 15

Which factor prevents gene flow between populations?

A) Respiration

B) Nutrition

C) Reproductive isolation

D) Excretion

14 / 15

A population of birds becomes separated on different islands and develops distinct characteristics. This is an example of:

A) Cloning

B) Binary fission

C) Speciation

D) Homeostasis

15 / 15

The ultimate result of speciation is:

A) Increased transpiration

B) Loss of all variation

C) Formation of new species

D) Formation of new cells only

Your score is

0%