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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
immigration and emigration
B
emigration and increased birthrate
C
decreased birthrate and emigration
D
increased death rate and immigration
2) On the Galápagos Islands, Charles Darwin observed
A
completely unrelated species on each of the islands.
B
species exactly like those found in South America.
C
species completely unrelated to those found in South America.
D
somewhat similar species with traits that suited their particular environment.
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
25%
B
75%
C
0%
D
50%
5) The two main sources of genetic variation are
A
gene shuffling and mutations.
B
single-gene traits and polygenic traits.
C
genotypes and phenotypes.
D
directional selection and disruptive selection.
6) Natural selection acts directly on
A
mutations
B
genes
C
alleles
D
phenotypes
7) The separation of populations by barriers such as rivers, mountains, or bodies of water is called ____________ isolation.
A
geographic
B
equalibrial
C
temporal
D
behavioral
8) Examples of fossils include preserved
A
body parts
B
eggs
C
footprints
D
all of the above
9) What is the basic unit (cell) of the nervous system?
A
receptor
B
neuron
C
organ
D
tissue
10) The process by which organ systems maintain a relatively constant internal environment is called
A
circulation
B
organization
C
teamwork
D
homeostasis
*select an answer for all questions
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