What homrone does the kidneys produce that stimulates red blood cell production in patients in renal failure or recoverying from chemotherapy?
a. Erythropoietin
b. Aldosterone
c. Adrenaline
d. Renin
Answer: a. Erythropoietin
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Histones:
A. have highly conserved sequences among eukaryotes. B. are rich in basic amino acids; about 25% of the total amino acids are lysine and arginine. C. are small proteins, ranging in molecular weight from 11,000 to 21,000. D. contain a histone-fold motif comprised of three ?-helices linked by two short loops. E. All of these choices are correct.
A fungus that destroys host plant cells by releasing toxins and enzymes would be categorized as which of these?
A. Biotrophic fungi B. Parasitic fungi C. Necrotrophic fungi D. Enzytrophic fungi
Influential in the opening and closing of stomata.
Choose the letter of the best match: A. abscisic acid B. auxin C. ethylene D. cytokinin E. gibberellin
flap of tissue called the __________ directs air through the __________, the opening to the __________
(windpipe). Fill in the blank(s) with the appropriate word(s).