AnswersBiologySimple and Complex Organisms

Practice Test Answers

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1
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Which description belongs in the area marked "X"?

A
increases chances of survival
B
keeps group safe from predators
C
divides jobs within group
D
helps take down prey
2
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Which two characteristics do all animals have?

A
They have a backbone, and their cells have membrane-bound organelles.
B
They are heterotrophs and have a backbone.
C
Their cells have a nucleus and membrane-bound organelles.
D
They are symmetrical and heterotrophic.
3

Which kingdom(s) include both unicellular and multicellular organisms?

A
Eubacteria
B
Animalia and Plantae
C
Fungi
D
Plantae and Archaebacteria
4

Which level of classification contains orders but is smaller than phylum?

A
species
B
family
C
class
D
kingdom
5

Which best explains why angiosperms are the most diverse and successful plant group today?

A
Water transport and photosynthesis are aided by vascular tissue.
B
Plant growth and increasing size are aided by a new way to distribute nutrients.
C
Reproduction is aided by exposed seeds and wind pollination.
D
Reproduction is aided by flowers, protected seeds, and insect pollinators.
6

Which best describes the different modes of bacterial reproduction?

A
In transformation, bacterial DNA is transferred from one bacterium to another by a replicating virus.
B
In genetic recombination, two new genetically identical cells are produced.
C
In conjugation, a special sex pilus is required to connect two bacterial cells.
D
In transduction, a bacterium exchanges a piece of its own DNA with another from the environment.
7

Which best describes what happens when an animal does not form a social group?

A
Foraging is more difficult when hunting a large prey.
B
Fighting off predators is easier with one individual.
C
Reproduction is easier because of access to multiple mates.
D
The division of labor is more difficult as it increases competition.
8

There are four steps in bacterial conjugation. The second step is missing in this list. 1. Special sex pilus connects two cells. 2. 3. Each cell makes a complementary DNA strand. 4. The cells separate. Which is the missing step for the process of conjugation described?

A
A DNA molecule attaches to the cell membrane.
B
The cell membrane elongates and pinches off.
C
Two new, identical cells are produced.
D
Some DNA moves from one cell to another.
9

Beans, peaches, and tomatoes are all in the same group of plants. What do these plants have in common?

A
They do not have vascular tissue.
B
Their seeds are not protected by fruit.
C
They bear flowers and seeds.
D
Their seeds do not have cotyledons.
10

Ceratium fusus is a protist that is found primarily in coastal waters, especially around the coast of the United Kingdom. These organisms are unique because they can undergo a special chemical reaction at night that helps defend them against predators. It provides defense by attracting larger predators that prey on the organisms that eat Ceratium fusus . Which characteristic of Ceratium fusus is being described?

A
glass-like cell walls
B
photosynthesis
C
chitin cell walls
D
bioluminescence
12

Which of the statements are true?

A
II and III
B
III and IV
C
II and IV
D
I and IV
13

Which label belongs in the area marked cap x ?

A
Are eukaryotic
B
Have a backbone
C
Are heterotrophs
D
Have an outer skeleton
14

Old classification systems based on physical characteristics would most likely disagree with the relationship between which two animals in the tree?

A
crocodiles and insects
B
humans and crocodiles
C
birds and bats
D
bats and humans

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