Which trait is an example of a qualitative trait in humans?
A) height
B) skin color
C) Huntington's disease
D) intelligence
C
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When a vesicle moves along microtubules toward the center of the cell, the molecular motor(s) _____ are used?
A. dynein B. both kinesin and dynein C. Molecular motors are not required for movement along microtubules. D. kinesin
A trait with variable expressivity is one that:
A. is only expressed in homozygous recessive individuals. B. is only expressed in homozygous dominant individuals. C. is only expressed in some of the individuals that have the genotype for that trait. D. is expressed in only some offspring of affected individuals. E. can be expressed differently in different individuals that have the genotype for that trait.
The scientific study of animal behavior is known as
A. proximate causes. B. ethology. C. behaviorism. D. psychology. E. inclusive ecology.
Answer the following questions true (T) or false (F)
1. Most digested food is absorbed into the blood by the villi of the small intestine. 2. Sodium is a nutrient because it provides us with energy. 3. Minerals are always chemical elements, not compounds.