Viruses — Unit test Answers

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Which example best demonstrates the importance of having knowledge of evolutionary relationships?

A
illustration of a plant leaf
B
organ transplantation between species
C
blood donation from a human to a human
D
DNA sequence of an insect
2
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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

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

A
kingdom
B
family
C
class
D
species
4

Consider the virus that has a complex shape. Which organism does this virus infect?

Question illustration
A
animals
B
bacteria
C
plants
D
fungi
6

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
7

Scientists group organisms into kingdoms by looking at specific characteristics. Thermus aquaticus, shown below, is a specialized bacteria called a thermophile. Thermophiles are microorganisms that can live in bodies of water that are extremely hot, such as deep sea hydrothermal vents.Which characteristic most likely describes a mushroom but not Thermus aquaticus?

Question illustration
A
cell wall
B
eukaryotic
C
unicellular
D
prokaryotic
8

Which level of biological classification is the lowest level that butterflies (invertebrates) and dogs (vertebrates) have in common?

A
domain
B
kingdom
C
species
D
family
9

A student studies a plant specimen. The student notices that the plant has seeds that are enclosed by a fruit. Which term can the student use to definitely describe the plant based on the evidence that they see?

A
angiosperm
B
gymnosperm
C
monocot
D
dicot
10

Which best relates cells and viruses?

A
Viruses grow and reproduce like cells.
B
Cells can infect specific host viruses.
C
RNA is found in cells, but not in viruses.
D
Viruses can infect certain cells.
11

Which structure allows a virus to recognize and attach to receptors on the host cell?

A
cell wall
B
capsid protein
C
cell membrane
D
nucleic acid
12

Which term represents animals without backbones?

A
invertebrates
B
heterotrophs
C
autotrophs
D
vertebrates
13

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.
14

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.
15

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
Two new, identical cells are produced.
B
The cell membrane elongates and pinches off.
C
Some DNA moves from one cell to another.
D
A DNA molecule attaches to the cell membrane.
16

Consider the classification levels of a human. EukaryaAnimaliaChordataMammaliaPrimatesHominidaeHomosapiensWhich is the most specific taxonomic level in the classification system above?

A
sapiens
B
Homo
C
Hominidae
D
Primates
17

Which is the correct written form of the scientific name that uses the rules of binomial nomenclature?

A
Felis domesticus
B
Felis Domesticus
C
Felis domesticus
D
felis domesticus
18

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

A
Plantae and Archaebacteria
B
Fungi
C
Eubacteria
D
Animalia and Plantae
19

Consider the recent phylogenetic tree of five different organisms. Old classification systems based on physical characteristics would most likely disagree with the relationship between which two animals in the tree?

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

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