Which of the following is secreted by cells in the juxtaglomerular apparatus in response to a
significant drop in blood pressure or blood volume?
a. atrial natriuretic factor
b. renin
c. aldosterone
d. antidiuretic hormone
e. angiotensin
B
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A major organism used in the biocontrol of a variety of types of insects is ________.
A. Clostridium botulinum B. Bacillus subtilis C. Bacillus thuringiensis D. Bacillus cereus
Which of the following is found in an open
circulatory system but NOT a closed circulatory system?
a. cavities in body tissues b. capillaries c. a heart or hearts d. a single vascular circuit e. more than one of these is found in an open circulatory system but NOT in a closed circulatory system
If an individual is homozygous for a certain trait, it means that:
A. it is rare in the population. B. it is a recessive trait. C. the individual received the same allele from each parent. D. it is a dominant trait. E. None of the answer options is correct.
Domains of a protein can best be described as:
A. the unique sequences of each participating protomer. B. functional components of a protein. C. independently folding units of a polypeptide chain. D. None of the answers provided is correct. E. All of the answers provided are correct.