This environment is characterized by high nutrient inputs and by relatively great fluctuations in
salinity and temperature:a.
a river.
b. an estuary.
c. a freshwater wetland.
d. a large lake.
e. the oceanic province.
B
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The extinction of the dinosaurs is believed to have been caused by ________
a. competition from mammals b. a natural global cooling cycle c. an asteroid impact d. disease
Which developmental event occurs last?
a. tissue specialization and growth b. gamete formation c. gastrulation d. cleavage e. fertilization
You try to start your car, but it does not start. Which of these is a hypothesis?
A) My car's battery is dead. B) If I recharge the battery, then my car will start. C) My car is too old to function properly. D) What is wrong with my car?
A scientist performs an experiment in which they create an artificial cell with a selectively permeable membrane through which only water can pass. They inject a 5 M solution of glucose into the cell and then place the cell into a beaker containing 10 M glucose. What effect do you expect to observe?
A. water moves out of the cell B. glucose moves into the cell C. glucose moves out of the cell D. water moves into the cell E. no net change in cell weight