Approximately how much of the energy available in the tissues of the producer is eventually incorporated into the tissues of a secondary consumer?

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Approximately how much of the energy available in
the tissues of the producer is eventually
incorporated into the tissues of a secondary
consumer?
Less than 1
More than 50
Between 20 and 30
Approximately 50
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An oakworm caterpillar feeds on the leaves of an
oak tree. This type of interaction is
mutualistic
commensalistic
parasitic
competitive
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Which of the following is most likely to
cause increases in a predator population?
A reduction in competition
Fewer prey
More parasites
A period of drought
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Which organisms in this food web can be described
as both primary and secondary consumers?
Hawks
Mice
Weasels
Raccoons
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Wolves and hawks are at the same trophic level
because they
both eat primary consumers
A both live on land
are both large mammals
have similar hunting patterns
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Which body system is directly responsible for
delivering nutrients to cells throughout the
body?
Integumentary system
Circulatory system
Endocrine system
Respiratory system
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Most viruses infect a specific kind of cell.
Which of the following are infected by the human
immunodeficiency virus (HIV)?
Helper T cells
Liver cells
GABA-receptor cells
Red blood cells
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Viruses differ from bacteria in that all viruses
cause insect-borne diseases
have rigid cell walls
must be reproduced in living cells
can be destroyed by antibiotics
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In DNA, which of the following determines the
traits of an organism?
Sequence of nitrogen bases
Number of sugars
Strength of hydrogen bonds
Amount of adenine
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Dogs (Canis familiaris) are most closely related
genetically to which of the following
organisms?
Grizzly bear (Ursus arctos)
African hunting dog (Lycaon pictus)
Domestic cat (Felis catus)
Gray wolf (Canis lupus)
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A laboratory investigation included examining
prepared slides of pond water. Single-celled
organisms with a nucleus and either cilia or
flagella were visible. These organisms probably
belong to the kingdom
Plantae
Fungi
Protista
Animalia
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Which structure regulates gas exchange during the
processes of photosynthesis and respiration?
S
R
T
Q
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Which of the following characteristics could help
short plants survive in areas with limited
sunlight?
Brightly colored flowers
Broad leaf surfaces
Thick stems
Shallow roots
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This diagram shows the biochemical pathway that
produces arginine in Neurospora, a mold.
Neurospora is easily grown on a simple jelly-like
medium. Different substances can be added to the
medium. A mutant Neurospora lacking Enzyme Y
would have to have which of these added to its
medium in order to survive?
Citrulline
Enzyme X
Ornithine
Enzyme Z
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In this food pyramid, which level contains
the greatest amount of energy?
Primary consumers
Producers
Secondary consumers
Tertiary consumers