L3: Natural Selection

Question 1

The 4 steps of Darwin’s Theory of Natural Selection

Answer 1

• Overproduction
• Variation
• Competition
• Selection

Question 2

Step of Natural Selection

Each species produces more offspring than can survive

Answer 2

Overproduction

Question 3

Step of Natural Selection

Each individual has a unique combination of inherited traits

Answer 3

Variation

Question 4

An inherited trait that increases an organism’s chances of survival

Answer 4

Adaptation

Question 5

Why is variation important?

Answer 5

• The environment changes
• The more variation in a species, the more likely it will survive
• The more variation of types of species, the more likely at least some will survive

Question 6

Step of Natural Selection

Individuals compete for limited resources; survival of the fittest

Answer 6

Competition

Question 7

The ability of an organism to survive long enough to reproduce

Answer 7

Fitness

Question 8

Step of Natural Selection

Individuals with the best traits will survive and pass on its traits

Answer 8

Selection

Question 9

States that each living species has descended, with changes, from other species over time

Answer 9

Descent with modification

Question 10

The 5 evidences for evolution

Answer 10

• Fossil Record
• Homologous Body Structures
• Vestigial Organs
• Embryology
• Biochemical Evidence

Question 11

The missing link between reptiles and birds

Answer 11

Archaeopteryx

Question 12

Similar anatomy in different types of animals because of common ancestor

Answer 12

Homologous Body Structures

Question 13

Leftover traces of evolution that serve no purpose

Answer 13

Vestigial Organs

Question 14

2 vestigial organs in a python

Answer 14

• Pelvic Girdle
• Femur