Speciation

Question 0

Pre-zygotic

Answer 0

Prevents continuation of species before the zygote is made

Question 1

2 isolation mechanisms

Answer 1

Pre-zygotic

Post-zygotic

Question 2

Post-zygotic

Answer 2

Prevents continuation of species after zygote is made

Question 3

5 types of isolation of populations

Answer 3

Behavioral
Geographic
Temporal
Mechanical/gametic
Hybrid infertility or inviability

Question 4

Behavioral isolation

Answer 4

Organisms won’t mate if they aren’t attracted to another (pre-zygotic)

Question 5

Geographic isolation

Answer 5

Physical barriers divide a population (pre-zygotic)

Question 6

Temporal isolation

Answer 6

Species breed at different times, day or night, different seasons (pre-zygotic)

Question 7

Mechanical isolation

Answer 7

Members of different populations cannot mate successfully, not compatible (pre-zygotic)

Question 8

Gametic isolation

Answer 8

Sperm and egg cannot form a zygote (pre-zygotic)

Question 9

Hybrid infertility

Answer 9

Fertilization occurs but offspring are not able to have offspring (post-zygotic)

Question 10

Hybrid inviability

Answer 10

Fertilization occurs but offspring aren’t able to survive (post-zygotic)

Question 11

Requirements for extinction

Answer 11

Organisms don’t have to be perfect only ones that are the best for survival

Question 12

_____% of species that once lived are extinct

Answer 12

99

Question 13

A typical lifetime is ______ years for a species

Answer 13

1 million

Question 14

2 types of extinction

Answer 14

Background

Mass

Question 15

Background extinction

Answer 15

Occurs continuously at a very low rate, happens to a few species in a small area, caused by local changes in an environment

Question 16

Mass extinction

Answer 16

Destroys many specie at a global level, caused by catastrophic events

Question 17

There’s has been at least ____ mass extinctions in the last ______ years

Answer 17

5 ; 600 million