The tree of life:
a. provides us with a map of the history of life.
b. provides us with a map that reflects the process of descent with modification.
c. connects evolutionary history to the current diversity of life on Earth.
d. All of the above.
D
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Which term refers to a particular set of alleles an organism carries?
a. Gene b. Phenotype c. Homozygous d. Heterozygous e. Genotype
What characterizes terrestrial tetrapods?
A) Lives on land, has four limbs B) Lives on land, has four sets of chromosomes C) Lives on land, has four cranial nerves D) Lives in the water, has four limbs
When the immune system improperly turns against the body's own molecules, the result is ________
A) an allergy B) AIDS C) an autoimmune disease D) an immunodeficiency disease
In Figure 23-2, the X points to a
a) guard cell. b) mesophyll cell. c) vein. d) stoma.