NOVA Evolution Lab

According to the video, what are the two key ingredients to natural selection

• Predation and the environment

• Reproduction and predation

• The most reproductively successful

• The best able to avoid being eaten

What does "the fittest" mean in an evolutionary sense?

• The strongest
• The longest lived
• The most reproductively successful
• The best able to avoid being eaten

Evolution is:

• Fixed in one direction
• Completely random
• Neither entirely fixed nor entirely random

According to the video, what is the goal of the tree of life?

• To summarize the fossil record
• To describe how natural selection works
• To be a library of all life that has ever lived
• To explain how all species are related to each other

Did you watch the video?

• yes

• no

What does the red circled node represent?

• The common ancestor species of A and B
• A speciation event
• Both a and b
• The common ancestor species of B and C

Which way does time run on this tree?

• From root to branch tip
• From branch tip to root
• Across branch tips, from left to right
• Across branch tips, from right to left

Which species lived more recently in time, the common ancestor of A and B or the common ancestor of B and C?

• A and B
• B and C
• Neither-- they existed at the same time

Which traits do A and B share? (You can check multiple if needed.)

• Trait 1
• Trait 2
• Trait 3
• Trait 4
• Trait 5

Which traits do B and C share? (You can check multiple if needed.)

• Trait 1

• Trait 2

• Trait 3

• Trait 4

• Trait 5