Mycorrhizae are especially effective in helping plant roots uptake
A. nitrogen.
B. potassium.
C. phosphorus.
D. iron.
E. magnesium.
Answer: C
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If the figure above shows the dances of bees in a hive at twelve noon on March 21 in the northern hemisphere, which dance is communicating that the food is to the south of the hive?
A) dance A B) dance B C) dance C D) It is not possible to tell if any of the dances indicate the food is to the south of the hive.
Many aromatic compounds used for growth substrates by bacteria are broken down during high heat autoclaving. Which is the BEST way to sterilize these aqueous solutions?
A) ethylene oxide gas treatment B) gamma irradiation C) 0.2 ?m filter sterilization D) ultraviolet radiation
The process by which plants produce seeds begins with fertilization
a. True b. False
Which of the following is not a part of the male genital (reproductive) system?
A. Epididymis B. Vas deferens C. Prostate D. Ureter