Why are estuarine environments ideal locations for the development of juveniles of many species of marine animals?
What will be an ideal response?
The primary reasons for the suitability of estuaries as nurseries is the low number of potential predators and the plentiful food supply.
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Before plowing a field, a farmer thought the bare field looked weed-free. Three days after plowing and turning over the soil, he was amazed to see thousands of tiny seedlings. What is the most likely reason for the mass germination of seeds?
A) large seeds that needed soil disturbance to germinate B) small seeds that need light to germinate C) small seeds that were scarified by exposure to plow D) large seeds that needed exposure to higher levels of oxygen to germinate
If you placed a red blood cell in a hypotonic solution, you would predict that its volume would ____ while the solute concentration in its cytoplasm would ____.
A. increase, increase B. increase, decrease C. decrease, increase D. decrease, decrease E. decrease, not change
Calmodulin is a:
a. hormone. b. calcium-binding protein. c. phosphatase. d. protein kinase. e. phospholipase.
The proper sequence, beginning to end, for the stages of mitosis is
A. prophase-metaphase-anaphase-telophase. B. anaphase-prophase-metaphase-telophase. C. prophase-anaphase-metaphase-telophase. D. telophase-anaphase-metaphase-prophase.