AnswersFL-2002070-MJ Comprehensive Science 2Lab: Natural Selection

Lab: Natural Selection — Unit test Answers

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1
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sugaramino acidlipidfat

A
sugar
B
amino acid
C
lipid
D
fat
2
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What caused natural selection among the peppered moths of Manchester, England?

A
natural environmental changes
B
human-caused environmental changes
C
genetic stability in the population
D
resource stability in the population
3

What did Darwin think about Earth and life while he was forming his theory of evolution?

A
Earth changes slowly over time, so populations might also.
B
Earth might cause rapid changes in the traits of individuals.
C
Earth cannot sustain large populations, so many animals become extinct.
D
Earth does not change much, so populations must adapt to survive.
4

Xavier used a chart to list the roles of two different molecules in protein production. Which headings best complete the chart?

Question illustration
A
Y: DNAZ: tRNA
B
Y: tRNAZ: DNA
C
Y: mRNAZ: tRNA
D
Y: tRNAZ: mRNA
5

cell nucleusribosomeamino acidprotein

A
cell nucleus
B
ribosome
C
amino acid
D
protein
6

genetic mutationnatural selectionpopulation growthasexual reproduction

A
genetic mutation
B
natural selection
C
population growth
D
asexual reproduction
7

Which timeline shows the correct order of contributions made to the discovery of DNA?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
8

One coiled spring is shown in the diagram.

Question illustration
A
protein
B
gene
C
nitrogen base
D
backbone
9

According to Darwin’s theory of evolution, in which order do the steps of natural selection happen?

A
Some members of a population survive and reproduce, their environment or location changes, and favorable traits are passed on to offspring.
B
A population’s environment or location changes, some members survive and reproduce, and favorable traits are passed on to offspring.
C
Favorable traits are passed on to offspring in a population, some members survive and reproduce, and the environment or location changes.
D
Some members of a population survive and reproduce, favorable traits are passed on to offspring, and their environment or location changes.
10

During natural selection, which organisms are most likely to survive as the environment changes?

A
ones that can best adapt to and survive in the changed environment
B
ones that can adapt to the original environment
C
ones that are randomly selected for survival independent of the environment
D
ones that are randomly selected for survival in the changed environment
12

Some illnesses and harmful infections are caused by bacteria. These bacteria grow in the human body and often make people sick with symptoms like coughing, sneezing, and fever. These illnesses are not related to any genetic mutations or other problems with DNA.

A
Gene therapy reduces symptoms but never cures illnesses.
B
Gene therapy does not work on most people.
C
Gene therapy only focuses on replacing mutated genes.
D
Gene therapy is too long a process.
14

Consider how to complete this timeline to show the order in which different evolutionary ideas were developed.

Question illustration
A
Z, X, Y
B
Y, Z, W
C
W, X, Z
D
Y, Z, X
15

Sherry draws a diagram to compare selective breeding and genetic engineering.

Question illustration
A
requires modification of DNA
B
involves the production of offspring
C
can be done with plants
D
may result in potential risks
16

Which is the best example of a neutral mutation?

A
one that causes abnormal human skin cells to reproduce and divide rapidly, producing a mole
B
one that increases the size of a seed pod, allowing the seeds inside to be spread and eventually grow
C
one that results in smooth plant leaves, while not changing the function of the leaves
D
one that brightens the feathers of a bird, making it easier for other animals to see it
17

Lactose is a sugar found in milk. How does the mutation that results in lactose tolerance affect people?

A
It makes milk taste sweeter to people.
B
It allows people to kill harmful bacteria in milk.
C
It helps people get more energy from molecules in milk.
D
It prevents people from digesting milk.

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