In an angiosperm, what is the function of the cotyledons?
a. transmitting food to an embryo
b. producing sufficient microspores
c. protecting a developing flower bud
d. surrounding the central carpel
a. transmitting food to an embryo
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For many years, no one bothered to test the food-competition hypothesis for why giraffes have long necks. Why?
A) It had been much too difficult to test. B) The hypothesis was so plausible that no one thought to question it. C) They tried, but the results were inconclusive. D) The hypothesis did not make clear predictions that could be tested.
The most critical step in the Gram stain is the application of the:
a. safranin. b. crystal violet. c. Gram's iodine. d. Gram's decolorizer.
Organic macromolecules may have formed by ____
a. addition of water to small organic subunits to facilitates enzymatic synthesis reactions b. dehydration synthesis reactions that combined smaller subunits into larger molecules c. increasing availability of inorganic compounds d. sequestration inside a semi-permeable membrane e. spontaneous aggregation of the different organic compounds in the atmosphere
People can reduce the chances of contracting rabbit fever by avoiding rabbits, muskrats, and (fleas/lice/ticks)
What will be an ideal response?