In a gymnosperm, pollen is produced in the male ____ and is transported by the wind to the female cone. 

A. anther
B. stamen
C. cone
D. pistil


C. cone

Biology & Microbiology

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The productivity and area hypotheses together suggest that a large, tropical continent would likely have __________ species richness.

A. low B. mature C. poor D. cyclical E. high

Biology & Microbiology

A chemical that is effective in preserving foods with a low pH such as bread is ________.

A. sodium propionate B. sodium nitrate C. sodium sulfite D. sodium citrate

Biology & Microbiology

In the tryptophan operon, low level of tryptophan nutrient results in the following events EXCEPT

A) that the synthesis of leader peptide is stalled. B) continuous transcription of the trp operon. C) that tryptophan repressor cannot bind to trp operator in the trp operon. D) synthesis of polycistronic mRNA of tryptophan structural genes. E) that regions 3 and 4 form a stem-loop.

Biology & Microbiology

Consumption of vitamin C

a. enhances absorption of iron. b. limits absorption of iron. c. does not affect absorption of iron.

Biology & Microbiology