If you were a paleontologist studying clams, you would have an easier research project than if you
were studying early plants. Why? Include in your discussion the term megafossils. What will be an ideal response?
Concepts to Consider: Megafossils are the fossilized parts of a plant or animal. Because the earliest
plants were typically softer than mollusks, fossils are harder to find and identify (although thousands
have been identified and studied); spores occur in the fossil record earlier than megafossils found to
date, so older plant fossils may be waiting to be discovered. Clams are aquatic and are more likely to
be covered by sediments before decomposing, and their shell is a tough calcareous material and so
does not decompose readily.
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In the Gibbs free-energy relationship, why is the T term necessary?
A) The free-energy change caused by a change in entropy is a function of temperature. B) The free-energy change caused by a change in potential energy is a function of temperature. C) The free-energy change caused by a change in electrical charge is a function of temperature.
Failure of the organs in the vestibular apparatus to function correctly can cause ____
a. lack of sensation on the skin b. loss of hearing c. motion sickness d. inability to smell e. night blindness
Which cells are designed to conduct electrical impulses?
A) Glial cells B) Nerve tissue C) Connective tissue D) Adipose cells E) Skeletal muscle cells
An X-linked recessive gene (c) produces red-green color blindness. A normal woman whose father was color blind marries a color-blind man. What are the chances that the first son will be color blind?
A. 0% B. 25% C. 50% D. 75% E. 100%