When two secondary oocytes are released from the ovaries and are fertilized by different sperm cells, what is the result?
A) clones B) identical twins C) conjoined twins D) fraternal twins
Answer: D
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F+ strains of Escherichia coli
A) do not have an F factor. B) have the F factor as a plasmid. C) have an integrated F factor. D) transfer the F factor to recipient cells at a high frequency.
The utricle and saccule ____
a. each contain an organ of dynamic equilibrium b. detect rotation of the head c. detect how the head is oriented relative to the ground d. are semicircular canals e. use the auditory nerve to send information to the brain
Endothermic animals
a. use up more energy than ectotherms. b. are more active at a wider range of temperatures than ectotherms. c. have a higher metabolic rate than ectotherms. d. may have feathers to reduce heat loss. e. fit all of these descriptions
What do carbohydrates, lipids, and proteins have in common?
A) All are important enzymes that function within the cell. B) All are inorganic molecules. C) Covalent bonding holds these molecules together. D) Polymers of these organic molecules form monomers via dehydration synthesis reactions.