Members of a species have moved into a new area. What is one positive result?

Increase in the area's biodiversity

Ways humans have evolved...

larger brains and walking on two legs (bipedalism)

How will genetic drift normally affect a population?

It will reduce genetic diversity.

What is founder effect?

a few are isolated from the pop, form a new pop, ↓ diversity

geographic separation and habitat specialization can lead to...

decreased gene flow and speciation

Which of the following best shows natural selection?

An organism will tend to survive and reproduce successfully.

What does fitness mean in nature?

ability to survive and reproduce in a given environment

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2nd half: Evolution Unit

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Natural Selection: Biology origin of life and evidence of evolution: Review for Test Natural Selection: Environmental Science Evolution by Natural Selection: Review for Test

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Questions 20

Answers

1
Individuals move to each other’s areas to mate Which part of natural selection is this?
founder effect
gene flow
nonrandom mating
genetic drift
2
Would speciation happen faster in a small or large population?
small
size doesn't matter
large
3
What type of organisms were present on early earth? (anaerobic - no oxygen) (aerobic - oxygen)
eukaryotic, anaerobic
eukaryotic, aerobic
prokaryotic, aerobic
prokaryotic, anaerobic
4
Members of a species have moved into a new area. What is one positive result?
Increase in the population size
Increase in the number of predators in the area
Decrease in the area's biodiversity
Increase in the area's biodiversity
5
What does gene flow do to diversity?
no effect
Increases
decreases
6
Big reason for extinction?
biodiversity
overproduction
climate change
migration
7
Which shows random death and a decrease in variation?
Gene flow
Genetic drift
Founder effect
Natural selection
8
What is the relationship between humans and chimps?
humans descended directly from chimps
have a common ancestor
unrelated
9
endosymbiotic theory = one cell engulfed others and they became...
chloroplast and mitochondria
golgi body and nucleus
ribosome and vacuole
mitochondria and lysosome
10
Ways humans have evolved...
smaller brains and walking on all fours (quadrupeds)
larger brains and smaller skulls
larger brains and walking on two legs (bipedalism)
11
How did the human skull evolve?
Tomato soup
skulls stayed the same size
skulls got larger
skulls got smaller
12
How will genetic drift normally affect a population?
It will increase the number of specific traits.
It will reduce genetic diversity.
It will accelerate the appearance of new traits.
It will promote the survival of the species
13
What is founder effect?
a few are isolated from the pop, form a new pop, ↓ diversity
individuals that are best suited to the environment
individuals moving into a new pop
14
Humans choosing a desirable trait and only breeding for that trait
Genetic drift
Artificial selection
Founder effect
Gene flow
15
geographic separation and habitat specialization can lead to...
genetic drift and decrease in diversity
increased gene flow and natural selection
decreased gene flow and speciation
extinction
16
What type of organisms were present on early earth?
Simple, unicellular
Complex, multicellular
Complex, unicellular
17
a prokaryotic cell engulfs others and became eukaryotic
endosymbiotic theory
theory of evolution
cell theory
18
Which of the following best shows natural selection?
A population takes all of the resources in its habitat
largest organisms receive the only breeding opportunities.
A community whose members work together
An organism will tend to survive and reproduce successfully.
19
What does fitness mean in nature?
perform better in sports
quality of being suitable to fulfill a particular role
ability to survive and reproduce in a given environment
being physically fit and healthy
20
How did human jaw change over time?
smaller and less pushed out
no change
bigger and more pushed out
depends on brain size

2nd half: Evolution Unit Flashcards | StudBud