A shared derived characteristic for members of the arthropod subgroup that includes spiders would be the presence of _____
A) chelicerae
B) an open circulatory system
C) an exoskeleton
D) a cuticle
E) a cephalothorax
Answer: A
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In the human life cycle, somatic cells are diploid and gametes are haploid
a. true b. false
Lateral line organs allow:a
invertebrates to detect gravity. b. humans to perform skillful acts with their eyes closed. c. amphibians to detect light. d. fish to detect vibrations in water. e. birds to detect sound waves.
Which of the following is the best description of an atom's physical structure?
A) An atom is a solid mass of material. B) The particles that form an atom are equidistant from each other. C) Atoms are little bubbles of space with mass concentrated at the center of the bubble. D) Atoms are little bubbles of space with mass concentrated on the outside surface of the bubble.
Hormones
A. bind to specific sensitive cells called target cells. B. are produced only by the brain. C. are required in high concentrations to have any effect. D. are only able to diffuse short distances from where they are produced.