Which of the following characteristics is not associated with cardiac muscle?
A) intercalated discs
B) contracts spontaneously
C) involuntary
D) pointed ends
E) striations
D) pointed ends
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If a pure-breeding wired-hair terrier (WW) is crossed with a pure-breeding smooth-hair terrier (ww), and a puppy with
a wavy hair is produced, the simplest explanation is ____.
a. a mutation has occurred b. hair texture is an X-linked trait c. incomplete dominance d. hair texture is a lethal trait e. codominance
Seeds include all of the following EXCEPT
a. endosperm. b. seed coats. c. cotyledons. d. integuments. e. embryos.
____________________ is an abnormal change in the shapes, sizes, and organization of cells in a tissue. Fill in the blank(s) with the appropriate word(s)
Nearly all echinoderms are found in which habitat?
A) beaches B) rivers C) ocean floor D) ocean surface E) lakes