X chromosome inactivation occurs when the embryo is a ball of about ________ cells
a. 36
b. 12
c. 200
d. 25
e. 2,000
c
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How is the process of carbon fixation used for a plant's growth?
a. It extracts carbons from plant sugars to be used for energy. b. It fixes carbon from a PGAL molecule into a sugar. c. It extracts carbon from an inorganic source (CO2) and uses it to build sugars which plants use for energy. d. It extracts carbon from an inorganic source (CO2) to produce O2 needed for plant growth. e. It fixes carbon which is then used in the light dependent reactions to produce ATP energy.
Which of the following is not a major function of proteins in the cell membrane?
a. acting as receptors b. anchoring cells to other structures c. forming the entire glycocalyx d. forming channels
_________ species can tolerate a wide range of environmental conditions and utilize a wide range of resources.
Fill in the blank(s) with the appropriate word(s).
How does PPE prevent evaporate cooling?
a. perspiration is absorbed in the layers b. the thermal barrier prevents heat transfer c. the vapor barrier prevents evaporation of sweet d. the liner reflects evaporative heat