Evidence from vascular tissues and developmental stages suggests that stamens evolved from:a
stems.
b. pollen grains.
c. roots.
d. leaves.
e. megasporangia
D
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As you are on the way to Tahiti for a vacation, your plane crash-lands on a previously undiscovered island
You soon find that the island is teeming with unfamiliar organisms, and you, as a student of biology, decide to survey them (with the aid of the Insta-Lab Portable Laboratory you brought along in your suitcase). You select three organisms and observe them in detail, making the notations found in the figure above. Which organism would you classify as an animal? A) organism A B) organism B C) organism C
What is the name of the motor protein that enables motion of organelles and cytoplasm within the cell?
a. actin b. ATP c. myosin d. ?-tubulin
The rate of production of new biomass by heterotrophs is called
A. secondary productivity. B. primary productivity. C. consumer productivity. D. gross productivity. E. net productivity.
In the female, the ________ secretes both estrogen and progesterone, and if fertilization does not occur, this structure degenerates
Fill in the blank(s) with correct word