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Flashcards in Biodiversity and Classification Deck (30)
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1

What is an example of a post zygotic isolating mechanism?

Hybrids of 2 species that are sterile

2

A population of gophers is geographically isolated by a recently built drainage ditch. This is an example of:

Allopatric speciation

3

Allopatric speciation

When populations become geographically separated, each being subjected to different selective pressures and then finally establishing reproductive isolating mechanisms

4

Hybrid breakdown occurs when...

Hybrids are fertile but produce offspring that are not fertile

5

Allopatric speciation requires...?

Geographical isolation

6

Geographical isolation

Includes mountains, rivers, and ocean which isolate species and prevent interbreeding

7

Two species of squirrel occupy different ranges on either side of the Grand Canyon. This is an example of:

Geographical isolation

8

A horse and a donkey mate to produce a mule. Their offspring lives but is sterile. This is an example of:

Hybrid sterility

9

Prezygotic isolating mechanism

- Habitat Preference
- Behavioural compatibility
- Structural incompatibility
- Physical incompatibility

10

Post-zygotic isolating mechanism

- Hybrid viability
- Hybrid sterility
- Hybrid breakdown

11

two groups of species prefer to mate at different times of the day. This is an example of a...

Post-zygotic isolating mechanism

12

What did Urey and Miller include in their experiment to represent the expected conditions on primitive earth?

- Water
- Methane
- Ammonia
- Hydrogen

13

After Miller and Urey's experiment ran for one week, how much of the original starting substances had been converted into amino acids?

2%

14

Which phylum are sponges found?

Porifera

15

Which kingdom belongs to the domain Eukarya?

- Protista
- Fungi
- Plantae
- Animalia

16

Which domain contains bacteria that can survive extremely harsh environments?

Archaea

17

List the taxonomic categories from broadest to most specific:

- Domain
- Kingdom
- Phylum
- Sub phylum
- Class
- Order
- Family
- Genus
- Species

18

Which phylum contains flat worms?

Platyhelminthes

19

Which phylum does a human belong to?

Chordata

20

Hybridization

Occurs when two different forms of a species that are normally reproductively isolated mate and produce offspring along a boundary called a hybridization zone.

21

Polyploidy

Occurs when an individual has more than 2 copies of each chromosome.

22

Polymorphism

Allows a species to change or blend in to protect itself.

23

Adaptive radiation

Is the relatively rapid evolution of many species from an ancestral species

24

Hybrid Sterility

The hybrid of two species may be viable but sterile, unable to breed
Eg.) The mule= the mix of a donkey and a horse

25

Hybrid inviability

The fertilized egg may fail to develop properly. Fewer young may be produced and they may have low survivability

26

Habitat preference

May not occupy the same habitat

27

Behavioural incompatibility

may be sexually active at different times of the year or day, and they may have specific mating calls or rituals

28

Structural incompatibility

Must have compatible sex organs, appearance and chemical makeup

29

Physical incompatibility

If a sperm and egg fail to unite, fertilization will be unsuccessful

30

Sympatric speciation

Is the formation of new species without geographic barriers.
Eg.) Polymorphism, Polyploidy, hybridization, or adaptive radiation