Unit Test — Unit test Answers

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Which statement accurately describes reproduction in animals?

A
All animals can reproduce asexually, and some can reproduce sexually.
B
All animals can reproduce sexually, and some can reproduce asexually.
C
Animals only reproduce sexually.
D
Animals only reproduce asexually.
3

Sal drew a diagram to compare vertebrates and invertebrates.

Question illustration
A
Are eukaryotic
B
Have an outer skeleton
C
Are heterotrophs
D
Have a backbone
5

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

A
Their seeds do not have cotyledons.
B
They do not have vascular tissue.
C
Their seeds are not protected by fruit.
D
They bear flowers and seeds.
7

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

A
Reproduction is aided by flowers, protected seeds, and insect pollinators.
B
Water transport and photosynthesis are aided by vascular tissue.
C
Plant growth and increasing size are aided by a new way to distribute nutrients.
D
Reproduction is aided by exposed seeds and wind pollination.
8

Which term represents animals without backbones?

A
invertebrates
B
heterotrophs
C
autotrophs
D
vertebrates
9

Which reason best explains why bacteria are good at causing infections in other organisms?

A
It would not be able to divide.
B
Bacteria are transmitted easily and reproduce quickly.
C
Bacteria evolve slowly as they pass on genetic information.
D
Bacteria are easily killed by a host’s immune system or antibiotics.
10

Which best describes the different modes of bacterial reproduction?

A
In genetic recombination, two new genetically identical cells are produced.
B
In conjugation, a special sex pilus is required to connect two bacterial cells.
C
In transduction, a bacterium exchanges a piece of its own DNA with another from the environment.
D
In transformation, bacterial DNA is transferred from one bacterium to another by a replicating virus.
11

Which of these are characteristics of all animal cells? Check all that apply. They contain a nucleus.They are eukaryotic. They lack membrane-bound organelles.They lack a nucleus.They are prokaryotic.They contain membrane-bound organelles.

A
They contain a nucleus.
B
They are eukaryotic.
C
They lack membrane-bound organelles.
D
They lack a nucleus.
E
They are prokaryotic.
F
They contain membrane-bound organelles.
14

When a plant produces sugars and transports them during translocation, which main plant tissues are at work?

A
dermal and meristem
B
dermal and vascular
C
ground and dermal
D
vascular and ground
15

Which statement best describes the difference between xylem and phloem?

A
Xylem transports water and nutrients in the plant, and phloem transports water and sugar.
B
Xylem cells make up vascular tissue, and phloem cells make up ground and dermal tissue.
C
Xylem tissue is found at the growing parts of plants, and phloem is found on the outer part of plants.
D
Xylem cells are thin-walled and tubular, and phloem cells are thick walled and strengthened by lignin.

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