BIOLOGY 1202 (HRINCEVICH) EXAM 1 COMPLETE
QUESTIONS AND VERIFIED ANSWERS
Darwin and Wallace's theory of evolution by natural selection was
revolutionary because it _____. - ANSWER dismissed the idea that
species are constant and emphasized the importance of variation and
change in populations
In Darwin's tree of life, each fork in the tree represents ____ - ANSWER
the most recent common ancestor of the subsequent branches
The Linnaeus classification system grouped organisms by ____ from
species to Domain designations. - ANSWER
Which statement illustrates the connection between natural selection
and overproduction of a population? - ANSWER individuals with
inherited traits that promote survival tend to have more surviving
offspring
Fossils found in strata reveal that ____. - ANSWER older strata carry
fossils that differ greatly from lining organisms
In a hypothetical environment, fishes called pike-cichlids are visual
predators of algae-eating fish (i.e., they
locate their prey by sight).
If a population of algae-eaters experiences predation pressure from
pike-cichlids,
which of the following should least likely be observed in the algae-eater
population over the course of many
generations?
A) Selection for drab coloration of the algae-eaters
B) Selection for nocturnal algae-eaters (active only at night)
, C) Selection for larger female algae-eaters, bearing broods composed of
more, and larger, young
D) Selection for algae-eaters that become sexually mature at smaller
overall body sizes
E) Selection for algae-eaters that are faster swimmers - ANSWER
Prior to the work of Lyell and Darwin, the prevailing belief was that Earth
is ____. - ANSWER a few thousand years old, and populations are
unchanging
Over long periods of time, many cave-dwelling organisms have lost their
eyes. Tapeworms have lost their digestive systems. Whales have lost
their hind limbs. How can natural selection account for these losses? -
ANSWER
Which of the following statements best explains why modification or
change in an organ or tissue during the lifetime of an individual is not
inherited? - ANSWER
What is the best modern definition of evolution? - ANSWER descent
with modification
Genetic drift produces variation for evolution when ____. - ANSWER
chance events cause allele frequencies to fluctuate unpredictably
Microevolutions occur when ____. - ANSWER changes in allele
frequencies in a population occur over generations
In the formula for determining a population's genotype frequencies, the 2
in the term 2pq is necessary because ____. - ANSWER
Which statement about the beak size of finches on the island of Daphne
Major during prolonged drought is true?
QUESTIONS AND VERIFIED ANSWERS
Darwin and Wallace's theory of evolution by natural selection was
revolutionary because it _____. - ANSWER dismissed the idea that
species are constant and emphasized the importance of variation and
change in populations
In Darwin's tree of life, each fork in the tree represents ____ - ANSWER
the most recent common ancestor of the subsequent branches
The Linnaeus classification system grouped organisms by ____ from
species to Domain designations. - ANSWER
Which statement illustrates the connection between natural selection
and overproduction of a population? - ANSWER individuals with
inherited traits that promote survival tend to have more surviving
offspring
Fossils found in strata reveal that ____. - ANSWER older strata carry
fossils that differ greatly from lining organisms
In a hypothetical environment, fishes called pike-cichlids are visual
predators of algae-eating fish (i.e., they
locate their prey by sight).
If a population of algae-eaters experiences predation pressure from
pike-cichlids,
which of the following should least likely be observed in the algae-eater
population over the course of many
generations?
A) Selection for drab coloration of the algae-eaters
B) Selection for nocturnal algae-eaters (active only at night)
, C) Selection for larger female algae-eaters, bearing broods composed of
more, and larger, young
D) Selection for algae-eaters that become sexually mature at smaller
overall body sizes
E) Selection for algae-eaters that are faster swimmers - ANSWER
Prior to the work of Lyell and Darwin, the prevailing belief was that Earth
is ____. - ANSWER a few thousand years old, and populations are
unchanging
Over long periods of time, many cave-dwelling organisms have lost their
eyes. Tapeworms have lost their digestive systems. Whales have lost
their hind limbs. How can natural selection account for these losses? -
ANSWER
Which of the following statements best explains why modification or
change in an organ or tissue during the lifetime of an individual is not
inherited? - ANSWER
What is the best modern definition of evolution? - ANSWER descent
with modification
Genetic drift produces variation for evolution when ____. - ANSWER
chance events cause allele frequencies to fluctuate unpredictably
Microevolutions occur when ____. - ANSWER changes in allele
frequencies in a population occur over generations
In the formula for determining a population's genotype frequencies, the 2
in the term 2pq is necessary because ____. - ANSWER
Which statement about the beak size of finches on the island of Daphne
Major during prolonged drought is true?
