When is it believed that sponges evolved?
a. 3.2 billion years ago
b. 1.2 billion years ago
c. 870 million years ago
d. 650 million years ago
e. 420 million years ago
c
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The first intelligence tests, developed in the late 19th century, tested a person's
A) mathematics and verbal skills. B) sensory perception and reaction time. C) problem-solving and logic skills. D) hand-eye coordination.
What should the tonicity of the distilled water be compared to body cells?
a. It should be isotonic to the cells. b. It should be hypotonic to the cells. c. It should be protonic to the cells. d. It should be hypertonic to the cells.
Which scenario describes an interaction between the system responsible for nutrient absorption and the system responsible for fighting illness?
a) food molecules are broken down at a faster rate to increase an organism's body temperature b) hormones travel through the blood to alert cells to absorb glucose c) the stomach responds to signs of a pathogen by forcing its contents back through the esophagus d) all of the other answer choices
Member of a pair of chromosomes that are alike and come together in synapsis during prophase of the first meiotic division; a homologue.
What will be an ideal response?