How are pituitary gland hormones distributed to organs throughout the body?
a. via axons
b. via the hypothalamus
c. through the bloodstream
d. through lymphatic vessels
e. via duct systems
c
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Which of the following statements about hydrostatic skeletons is false?
A. Longitudinal muscle contractions increase the length of the body cavity. B. Hydrostatic skeletons are found in many vascular plants and almost all multicellular animals. C. Movement is produced by muscles that exert pressure against a fluid-filled cavity. D. Intervertebral discs and cartilage are examples of hydrostatic elements in the vertebrate skeletal system. E. Circular and longitudinal muscles function as antagonists.
The mesh of branching filaments of fungi is collectively called the ________
a. hyphae b. ascocarp c. mycelium d. septae
Which of the following describes a deciduous conifer?
a. It drops all its leaves at once in autumn. b. It is pollinated by both beetles and birds. c. It grows new pine cones every six months. d. It has flowers that go dormant in winter.
The first cell seen by Robert Hooke using a microscope was a
a. skin cell. b. cork cell. c. blood cell. d. root tip cell. e. sperm cell.