A group of cells having similar structure and function is called a(n)
A. population.
B. organism.
C. organ.
D. tissue.
E. organ system.
Answer: D
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Replication usually begins in GC rich regions due to the presence of only 2 hydrogen bonds between the bases
Indicate whether the statement is true or false
How many checkpoints occur during interphase prior to a cell entering mitosis?
a. one b. two c. three d. four
If an aerobic organism stopped taking in oxygen, which process would stop first?
a. the splitting of glucose into two pyruvates b. the reduction of NAD+ to NADH c. the release of carbon dioxide d. electron transfer phosphorylation e. the initiation of the Krebs Cycle
Your biology professor takes the class on a field trip to a local lake. You spend an hour studying the lake and writing down all observations. You hypothesize that the lake is oligotrophic. Which observations would support this hypothesis? Check all that apply.
A. The lake has little planktonic growth. B. An oxygen probe reveals low oxygen content in the water. C. The lake has extensive aquatic plant beds. D. The shoreline is mostly rock and sand with very little vegetative matter. E. The bottom of the lake is easily visible.