Pollen comes from the
A. anther.
B. petal.
C. style.
D. stigma.
E. carpel.
Answer: A
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When testing the effectiveness of a new cleaning product, which sample would be more valid? a. 222 bacteria in the Petri dish b. None of the samples are valid
c. 14 bacteria in the Petri dish d. All samples are equally valid. e. 3 bacteria in the Petri dish
Interaction between two distinct polypeptide chains is what type of structure in a protein?
A) primary structure B) secondary structure C) tertiary structure D) quaternary structure E) both primary and secondary structure
The copulatory organ of the earthworm is the
a. penis. b. clitellum. c. gonopodium. d. vestibule.
Which food product would likely contain the largest amount of unsaturated fat?
a. butter b. lard
c. salami d. olives e. cheese