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BIOLOGY JLAB EXAM WITH ALL QUESTIONS AND 100% VERIFIED ANSWERS
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BIOLOGY JLAB EXAM WITH ALL QUESTIONSAND 100% VERIFIED ANSWERS
Ascidians are sac-like marine organisms. Their larvae have well-developed brains
and dorsal nerve cords. This suggests that ascidians should be classified with the - -
ANSWER chordates
To maintain homeostasis, it is most important for an animal to be able to - -
ANSWER respond to its environment
A scientist develops a hypothesis, designs an experiment, and obtains data that
support her hypothesis. Which of the following best describes when a hypothesis
becomes a theory? - ANSWER When it is supported by consistent data from many
experimental trials
Which of these is a decomposer in a Virginia forest? - ANSWER a mushroom
According to the classification key, what is the genus and species of this organism?
- ANSWER Eurytides marcellus
A population of mice is evenly divided into two groups, and each group is placed
on an isolated island with no existing mouse population. Which statement best
explains the difference in the mouse populations on Island A and Island B at the
end of the 20 years? - ANSWER Conditions on Island B favored the brown-furred
individuals,
while both fur colors were evenly advantaged on Island A.
Lamarck was an early scientist who
studied the development of characteristics in
organisms over time. Which of the following
choices best describes his views on how
organisms change over time? - ANSWER Theory of acquired characteristics
A certain virus causes a disease of the
, digestive system. What is the most likely source of
this virus? - ANSWER water
Based on this classification scheme, the European otter and the leopard are in
the same — - ANSWER order but different families
Which area of the leaf is most
responsible for protecting the leaf from the
drying effects of the air? - ANSWER the cuticle
According to the data in the graph,
during which period did the overall bluegill
population decline? - ANSWER 1996-1999
The picture shows the trachea and
surrounding tissue of a flea. Which of these
best describes the shape of the flea trachea? - ANSWER a long, branched tube
The organisms at the beginning of the food chain are - - ANSWER producers
Two plants are crossed, and the traits of height and color are assessed in the
offspring. The following cross was conducted: TTPP × ttpp.
T = dominant allele for height, tall plant
t = recessive allele for height, short plant
P = dominant allele for color, purple
p = recessive allele for color, white
Which of the following choices correctly describes the offspring? - ANSWER all
are tall and purple
The body of which of these organisms has the least specialized organization? -
ANSWER sponge
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