BIO 200 Lecture EXAM 1 Questions
and Answers
A pair of swallows (song birds) is blown off course by a storm and end up on an
island where there are no other swallows. As luck would have it, the pair is a male
and a female and there is a lot of food on the island. This is an example of: -
ANSWER-Founder effect
A local pond is a favorite habitat for Canadian geese. Coyotes prey on geese and
typically hunt either old or fat geese. After several years, the average of age and
weight of the geese have reduced. These changes are due to:
A. Stabilizing selection
B. Negative frequency dependent selection
C. Directional selection.
D. Disruptive selection
E. Heterozygote advantage - ANSWER-C
When a male sea horse mates with a female leafy sea dragon (a closely related
species), they produce fertile hybrids. Breeding studies have shown that offspring of
the hybrids are infertile. This is an example of:
A. Hybrid breakdown
B. Hybrid infertility
C. Hybrid inviability
D. Gametic isolation
E. A and D - ANSWER-A
Four eras of earth - ANSWER-Precambrian, Paleozoic, Mesozoic, Cenozoic
Panspermia - ANSWER-The idea of life coming from outside our planet
Four steps basic steps to the formation of life - ANSWER-1. Abiotic synthesis of
organic materials
2. Formation of polymers
3. Formation of protobionts
4. Origin of hereditary material
Where did the first life probably exist? - ANSWER-An RNA world
Protoplanetary disk - ANSWER-A rotating disk of dense gas and dust around a
young newly formed star
Protoplanet - ANSWER-A large body of matter in orbit around the sun or a star and
thought to be developing into a planet
and Answers
A pair of swallows (song birds) is blown off course by a storm and end up on an
island where there are no other swallows. As luck would have it, the pair is a male
and a female and there is a lot of food on the island. This is an example of: -
ANSWER-Founder effect
A local pond is a favorite habitat for Canadian geese. Coyotes prey on geese and
typically hunt either old or fat geese. After several years, the average of age and
weight of the geese have reduced. These changes are due to:
A. Stabilizing selection
B. Negative frequency dependent selection
C. Directional selection.
D. Disruptive selection
E. Heterozygote advantage - ANSWER-C
When a male sea horse mates with a female leafy sea dragon (a closely related
species), they produce fertile hybrids. Breeding studies have shown that offspring of
the hybrids are infertile. This is an example of:
A. Hybrid breakdown
B. Hybrid infertility
C. Hybrid inviability
D. Gametic isolation
E. A and D - ANSWER-A
Four eras of earth - ANSWER-Precambrian, Paleozoic, Mesozoic, Cenozoic
Panspermia - ANSWER-The idea of life coming from outside our planet
Four steps basic steps to the formation of life - ANSWER-1. Abiotic synthesis of
organic materials
2. Formation of polymers
3. Formation of protobionts
4. Origin of hereditary material
Where did the first life probably exist? - ANSWER-An RNA world
Protoplanetary disk - ANSWER-A rotating disk of dense gas and dust around a
young newly formed star
Protoplanet - ANSWER-A large body of matter in orbit around the sun or a star and
thought to be developing into a planet
