Discuss osmotic balance in freshwater and saltwater fishes
What will be an ideal response?
Freshwater fish live in an environment in which their bodies have a higher solute concentration than their environment. Freshwater fish do not drink water and are constantly excreting excess water by producing high volumes of dilute urine; the cells of freshwater fishes are also salt permeable. Marine fishes have a lower solute concentration than their environment. Marine fishes are constantly drinking water while excreting small volumes of highly concentrated urine.
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Some of the offspring of a beetle develop spots. These spots make it harder for birds to see the beetles and thus, the spotted beetles tend to survive and produce more offspring than the beetles without spots. This heritable trait is called a(n) ____________________.
Fill in the blank(s) with the appropriate word(s).
All of the following will enhance the formation of hail EXCEPT
A. great vertical development of the cloud. B. great amounts of cloud water droplets and water vapor. C. little temperature contrast between fronts. D. strong updrafts and downdrafts found within the cloud.
Precipitation of calcium carbonate in caverns can create:
a. springs. b. uvalas. c. sinkholes. d. stalactites. e. disappearing streams.
Describe the pathways by which igneous, sedimentary, and metamorphic rocks may change into each other
What will be an ideal response?