You are shown an unknown cell under a microscope. Which of the following structures or molecule would allow you to identify it as a eukaryotic cell?
a) DNA
b) nucleus
c) cell membrane
d) ribosomes
Answer: b) nucleus
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Refer to the figure. If you examine side A after three days, you should find _____
A) a decrease in the concentration of NaCl and glucose and an increase in the water level B) a decrease in the concentration of NaCl, an increase in water level, and no change in the concentration of glucose C) no net change in the system D) a decrease in the concentration of NaCl and a decrease in the water level E) no change in the concentration of NaCl and glucose and an increase in the water level
In plants, the light-dependent reactions require
A. ATP. B. O2. C. NADP+. D. glucose. E. Calvin cycle enzymes.
Pure-breeding individuals always have the ____________________ genotype
Fill in the blank(s) with correct word
Natural selection is a process in which environmental pressures result in the differential ________ and ________ of individuals in a population
a. survival, physical features b. genetics, mutations c. survival, reproduction d. reproduction, mutations e. genes, mutations