Organisms that make their own organic compounds from inorganic substances are called
A. animals.
B. animorphs.
C. autotrophs.
D. heterotrophs.
C. autotrophs
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The values (e.g., 80 or 100) noted on the branches of an evolutionary tree reflect:
A. how similar an individual taxa is to the extinct ancestor at the node of the branch. B. how similar an individual taxa is to the common ancestor at the root of the tree. C. the confidence the investigator has in the information contained in that branch. D. the percentage of species in that branch. E. the number of genes used to determine the relationship displayed in the tree.
For a very rare inherited disease, the frequency of heterozygotes in a population is
A) approximately half that of the dominant allele. B) approximately double that of the recessive allele. C) very close to 0. D) near 1.
Venus flytraps live in low pH soils that have poor nutrition. They have adapted specialized leaves and nectars to attract and trap their food of choice. Which of the following describes Venus flytraps?
a. saprophyte b. epiphyte c. insectivore d. parasite
Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years, and when a patient becomes stressed, the virus is released, forming cold sores on the lips. Why would the virus form a cold sore?
a. To allow it to spread to a new host b. So that it can mutate and survive an antibiotic treatments c. To move to another part of the body d. To avoid the immune system e. To warn other people that the host is infected