In a case of positive feedback, an increase in the stimulus causes ______ in the response and does not result in homeostasis.
A. a slight decrease
B. an increase
C. no change
D. a large decrease
B. an increase
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In T7, the proteins that inhibit the host restriction system are synthesized
A) before the entire T7 genome enters the cell. B) while the T7 genome is entering the cell but before it enters the nucleus. C) after the T7 genome is completely within the host cytoplasm. D) in response to the T7 genome binding to the host chromosome.
You breed a black, long-haired rabbit with a white, short-haired rabbit. All of the offspring have long, black hair. If the genes for hair color and length are closely linked on the same chromosome, what would you expect to see in the F2 generation?
A. 15 black, long-haired: 1 black, short-haired: 1 white, long-haired: 5 white, short-haired B. 3 black, long-haired: 1 white, short-haired C. 9 black, long-haired: 3 black, short-haired: 3 white, long-haired: 1 white, short-haired D. 3 black, long-haired: 9 black, short-haired: 9 white, long-haired: 1 white, short-haired E. All long-haired black
The stroma of a chloroplast is most like which
of the following cellular structures?
a. ribosomes b. cell membranes c. the cytoplasm d. nuclei e. mitochondria
Which of these is the main function of the blood-brain barrier?
Protects the CNS by selecting the substances that can enter the cerebrospinal fluid from the blood Prevents any molecules from entering the cerebrospinal fluid from the blood Coordinates the nervous and endocrine systems by influencing the pituitary gland Filters sensory input and keeps the cerebral cortex in an alert state