In order to arrive at a solution to a problem, a

scientist usually conducts one or more
a. laws.
b. theories.
c. experiments.
d. principles.
e. facts.


Answer: c

Biology & Microbiology

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Which list represents the correct order of structures from outside to inside in the stem of a vascular plant?

a. stele, cortex, epidermis, pith b. epidermis, pith, cortex, stele c. cortex, stele, pith, epidermis d. epidermis, cortex, stele, pith e. stele, epidermis, pith, cortex

Biology & Microbiology

A(n) ____ allows two rival males to assess one another’s strengths without engaging in a potentially damaging fight

a. conditioned stimuli b. eusocial response c. instinctive behavior d. kinetic movement e. threat display

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The secretion of each of the anterior pituitary

hormones requires a. stimulation from the posterior pituitary. b. that they first be secreted from the neurons of the hypothalamus. c. two capillary beds. d. the action of minute amounts of releasing hormones. e. two capillary beds and the action of minute amounts of releasing hormones.

Biology & Microbiology

Thermoregulation in ectotherms can be accomplished by four of the following. Which action will not result in

thermoregulation? a. migrating b. basking c. burrowing d. adapting to seasonal weather variations e. increasing internal metabolism

Biology & Microbiology