What is the process that Darwin described as "descent with modification?"
A. The characteristics of a species may change from generation to generation.
B. Characteristics can be directly transferred between species.
C. Only related species show similar characteristics.
D. Species are related by common ancestry.
Answer: A. The characteristics of a species may change from generation to generation.
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Which muscles may contract during inspiration?
(a) external intercostals. (b) internal intercostals. (c) abdominal. (d) both b and c.
Seawater is considered buffered due to the presence of:
a. oxygen ions. b. nitrogen ions. c. bicarbonate ions. d. silicon ions. e. calcium ions.
In temperate deciduous forest, light penetration to the ground is greater during summer than during winter
Indicate whether the statement is true or false
Which of the following is an adaptation that enables cephalopods to escape from their predators?
a. torsion b. a hard shell c. a modified radula d. rapidly changing colors e. poisonous salivary secretions