Many aquatic invertebrates use this structure to perceive changes in their body's position and
orientation.
a. statocysts
b. lateral line
c. stereocilia
d. saccule
e. otoliths
A
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In DNA, cytosine binds with
A) uracil. B) adenine. C) thymine. D) guanine.
The ____ gland is associated with biological clocks or biorhythms
a. pineal b. parathyroid c. hypothalamus d. pituitary e. thymus
The significance of oocyte polarity is that
a. cell systems near the anterior (head) end of an organism are aligned differently from cell systems at the posterior end. b. it results in the formation of the gray crescent. c. it produces differently pigmented regions in the egg. d. cytoplasmic substances located at one end of the zygote differ from cytoplasmic substances located at the other end. e. all of these are true.
What is attached to the plastron and may be involved in respiration?
What will be an ideal response?