AnswersCV Q4 MJ Science 3 Adv 2002110 Compacted Review of Grade.7.Life for SSA PrepUnit Test

Unit Test — Unit test Answers

5 verified answers
1
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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.
2
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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.
3

Which list contains only animal phyla?

A
mosses, annelids, conifers, chordates
B
mosses, ferns, conifers, flowering plants
C
cnidarians, mollusks, annelids, arthropods, echinoderms, chordates
D
cnidarians, ferns, annelids, arthropods, echinoderms, flowering plants
4

genetic mutationnatural selectionpopulation growthasexual reproduction

A
genetic mutation
B
natural selection
C
population growth
D
asexual reproduction
5

Which statement best describes the fossil record?

A
It is a complete record.
B
It is an incomplete record.
C
Most fossils are older than five billion years.
D
All fossils are younger than six hundred years.
6

Which describes vestigial structures and how they relate to evolution?

A
Snakes have tiny internal hind leg bones, indicating that they likely descended from lizards.
B
Humans and dogs have similar bone structures in their forelimbs, indicating a common ancestor.
C
Dolphins and birds have structures that are adapted for swimming, but the structures did not evolve the same way.
D
The DNA of mice and chickens shows similar patterns, suggesting that the two species are related.
7

The fossil record helps scientists identify a single species from which other organisms have descended. Which is used to refer to this single species?

A
parent organism
B
fossils
C
descendant
D
common ancestor
8

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
9

This fossil shows tunnels left after animals burrowed through the sediment.

Question illustration
A
It is a mold, because it shows empty spaces in the organisms' shapes.
B
It is a cast, because it shows empty spaces in the organisms' shapes.
C
It is a trace, because it shows evidence of animal activity.
D
It is an imprint, because it shows evidence of animal activity.
10

Compared to absolute dating, what is a disadvantage of relative dating?

A
Fossils must be in undisturbed rock layers to determine age.
B
Age, in years, cannot be determined for an individual fossil.
C
Age can be determined by comparing the depth of one rock layer to another.
D
Two or more fossils must be compared to determine age.
11

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

Several butterflies within a large population have wings with large dots on them. This wing pattern warns predators not to eat the butterflies.

A
favorable adaptation, which is one condition required for natural selection
B
unfavorable adaptation, which is passed on to offspring in all cases
C
favorable adaptation, which is passed on to offspring in very few cases
D
unfavorable adaptation, which is not a condition for natural selection
13

Four students are trying to summarize how scientists classify organisms, and are discussing whose answer is best. This chart shows the four students’ attempts.

Question illustration
A
Cassandra
B
Marco
C
Nuris
D
Katelyn
14

Scientists crossed two different species of fruit trees. This produced offspring whose fruit had characteristics of each parent.What is most likely true about the offspring?

A
They are the same species as the male parent.
B
They will not be able to produce offspring.
C
They are the same species as the female parent.
D
They will be able to produce offspring.
15

Which domain contains the most kingdoms?

A
Bacteria
B
Archaea
C
Eukarya
D
Protists

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