In conifers, microspores develop into

A. ovules.
B. male cones.
C. pollen grains.
D. a nucellus.
E. flagellated sperm.


Answer: C

Biology & Microbiology

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Legume plants provide certain amino acids to the ________ so that they do not need to assimilate ________. In return, the bacteroids shuttle amino acids bearing the fixed nitrogen back to the plant.

A. bacteroids; ammonia B. bacteroids; nitrogen C. bacteroids; phosphorus  D. root hairs; nitrogen

Biology & Microbiology

In the lac operon, CAP binding to the CAP site of the promoter ____

a. occurs when glucose is present b. inhibits RNA polymerase from binding to the promoter c. occurs when cAMP is absent d. helps the repressor protein bind to the operator e. enables RNA polymerase to transcribe the operon’s genes

Biology & Microbiology

Restriction Enzymes. What do they do?

What will be an ideal response?

Biology & Microbiology

The Archaea and Bacteria are similar in that all 

A. live in extreme environments. B. carry on photosynthesis. C. lack a nucleus. D. carry on aerobic respiration.

Biology & Microbiology