Ecology is:
a. a type of life style.
b. the study of the interaction of organisms and their environment.
c. a place where organisms live.
d. what happens when a predator consumes a prey item.
e. the study of the physical environment in an ecosystem.
B
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Mendel's dihybrid crosses (but not his
monohybrid crosses) showed that
a. some genes were linked together. b. the two alleles controlling a trait were divided equally among the gametes. c. alleles for different traits were inherited independently. d. one of the pair of alleles is dominant to the other. e. the crossing of two different homozygous forms will not produce any offspring in the first generation that would look like either of the parents.
In meiosis, _____ are separated during anaphase I, and _____ are separated during anaphase II
a. heterologous chromosomes; homologous chromosomes b. homologous chromosomes; homologous chromosomes c. homologous chromosomes; sister chromatids d. sister chromatids; homologous chromosomes e. sister chromosomes; homologous chromosomes
The two major forces contributing to allopatric speciation are:a
mutation and natural selection. b. natural selection and migration. c. nonrandom mating and migration. d. natural selection and genetic drift. e. genetic drift and mutation.
What is the role of fossils in supporting the theory of common descent?
A) Fossils of dinosaurs show that other types of life existed, but there is no evidence of relationships between them. B) There have been many fossils of intermediate types discovered that provide strong support for the theory of common descent. C) There are plenty of fossils to show that animals have evolved, but there are not enough fossils of human ancestors to suggest that humans are related to other animals. D) Fossil evidence has been found to support the relationship between humans and other primates but only in Europe.