The theory that states chloroplasts and mitochondria arose from prokaryotes that lived within other cells is the ________ theory.
Fill in the blank(s) with the appropriate word(s).
Ans: Endosymbiotic
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Pasteurization of milk is an example of a disease control measure aimed at
A) preventing host-to-host transmission. B) controlling the disease vector. C) preventing common source diseases. D) eliminating the disease reservoir.
The common characteristic of Alveolata is
A. a single, unique mitochondria. B. a layer of flattened vesicles beneath the plasma membrane. C. silica covering. D. funnel-shaped, contractile collar. E. presence of a plasmodium.
Which region of the brain is responsible for
controlling reflexes such as swallowing, coughing, and sneezing?
a. midbrain b. pons c. thalamus d. medulla oblongata e. cerebrum
A group of organisms of one species that interbreed and occupy the same geographical location is a
A. population. B. flock. C. herd. D. community. E. peer group.