__________ is a diagnostic tool that reveals missing
or extra chromosomes and some structural changes in
an individual’s chromosomes. Fill in the blank(s) with the appropriate word(s).
Answer: Karyotyping
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Penicillin is a competitive inhibitor produced by a fungus in order to kill invading bacteria. It does this by mimicking the substrate required by the bacterium to build and repair its cell wall. Describe how mimicking the substrate would result in the death of the bacterium.
What will be an ideal response?
Four of the five answers listed below are true
for gibberellin. Select the EXCEPTION.
a. stimulates seed germination b. found in fungi c. causes stem elongation d. stimulates fruit ripening e. is a growth hormone
Vasopressin is a hormone that is primarily released when the body is low on water. Release of vasopressin causes the kidneys to conserve water by concentrating urine and decreasing urine output. However, vasopressin also has additional functions in other tissues such as the brain and blood vessels, which are not directly involved in urine production. How could it be possible for vasopressin to trigger different responses in different tissues?
A. Vasopressin binds to the same exact receptor in different tissues, but causes a different conformational change to the receptor in each tissue. B. The kidneys have a receptor for vasopressin, but cells in the brain and blood vessels do not have a receptor for vasopressin. C. Vasopressin can bind to, and act on, different receptor subtypes, leading to different cellular responses in different tissues. D. Vasopressin can be released at different times to result in different effects.
An oligotrophic ecosystem would be most likely to exist in a/an ________
a) Ocean b) High mountain lake c) Tropical pond d) Polluted river