In order to disperse water throughout themselves more effectively, plants evolved
A. pores.
B. high pressure in their roots.
C. circulatory systems.
D. vascular systems.
Answer: D
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The first step of the scientific method is to
a. ask a question. b. construct a hypothesis. c. observe carefully. d. formulate a prediction.
Which of the following would be the least
satisfactory organism for genetic research? a. humans b. bacteria c. corn d. fruit flies e. peas
When ciliary action in the lungs is interfered with and mucus builds up, which disease may develop?
a. emphysema b. bronchitis c. pleurisy d. pneumothorax e. tuberculosis
Phenotypes are generally a product of
a) two or more gene combination with each other b) the genotype c) the environment d) multiple alleles at the same gene locus e) the genotype in combination with the environment