Lois plans to set up a freshwater aquarium. How might she add oxygen to the system for the fish to use during respiration?
A) Make sure the aquarium receives enough sunlight so that the water molecules can be split.
B) Add soil and sand as bottom substrate that will release stored oxygen.
C) Add plants that produce oxygen during photosynthesis.
D) Add snails to the aquarium to decompose material that adds oxygen to the system.
Ans: C) Add plants that produce oxygen during photosynthesis.
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A. are specialized organelles found on some epithelial cells. B. are used by epithelial cells to move substances along cell surfaces. C. are used by sperm cells for motion. D. None of these choices are correct.
This chemical compound, typically added to drinking water, makes enamel more resistant to dissolving in acid
A. Calcium B. Chlorine C. Chloramine D. Fluoride
Solar tracking is similar to _____
a. phototropism c. photoperiodism b. gravitropism d. thigmotropism
Positive feedback systems play a role in ____
a. blood pressure control b. fluid volume regulation c. body temperature regulation d. child birth e. blood glucose regulation