What stage of embryonic development implants in the lining of the uterus?
A. blastocyst
B. zygote
C. morula
D. coelom
Answer: A
Biology & Microbiology
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The portion of the flower containing pollen grains is
(a) the pollen sac. (b) the microsporangium. (c) the anther. (d) all of the above.
Biology & Microbiology
What process occurs in both the aerobic and anaerobic pathways?
a. glycolysis b. Krebs cycle c. electron transport chain d. fermentation e. anaerobic processes
Biology & Microbiology
What are nematocysts?
a. reproductive cells b. excretory organs c. sets of muscle cells
d. circulatory cells e. defensive cells
Biology & Microbiology
Which current carries warm water northward in the western Atlantic ocean?
1.Canary current
2.Caribbean current
3.Gulf Stream
4.North Atlantic current