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Biology S2- II
Test Description: Bio Stuff
Instructions: Answer all questions to get your test result.
1) Which are two ways a population can decrease in size?
A
decreased birthrate and emigration
B
increased death rate and immigration
C
emigration and increased birthrate
D
immigration and emigration
2) On the Galápagos Islands, Charles Darwin observed
A
somewhat similar species with traits that suited their particular environment.
B
species exactly like those found in South America.
C
completely unrelated species on each of the islands.
D
species completely unrelated to those found in South America.
3) Darwin viewed the fossil record as
A
interesting but unrelated to the evolution of modern species.
B
evidence that Earth was thousands of years old.
C
a record of evolution.
D
evidence that traits are acquired through use or disuse.evidence that traits are acquired through us
4) If an allele makes up one fourth of a population’s alleles for a given trait, its relative frequency is
A
75%
B
50%
C
25%
D
0%
5) The two main sources of genetic variation are
A
genotypes and phenotypes.
B
single-gene traits and polygenic traits.
C
directional selection and disruptive selection.
D
gene shuffling and mutations.
6) Natural selection acts directly on
A
mutations
B
alleles
C
genes
D
phenotypes
7) The separation of populations by barriers such as rivers, mountains, or bodies of water is called ____________ isolation.
A
temporal
B
equalibrial
C
geographic
D
behavioral
8) Examples of fossils include preserved
A
body parts
B
all of the above
C
footprints
D
eggs
9) What is the basic unit (cell) of the nervous system?
A
tissue
B
neuron
C
organ
D
receptor
10) The process by which organ systems maintain a relatively constant internal environment is called
A
teamwork
B
circulation
C
organization
D
homeostasis
*select an answer for all questions
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