Which of the following relationships is INCORRECT?
A. Maternal effect genes activate gap genes.
B. Gap genes activate pair-rule genes.
C. Pair-rule genes activate segment polarity genes.
D. These relationships are all correct.
E. Segment polarity genes activate pair-rule genes.
E. Segment polarity genes activate pair-rule genes.
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Each time a diatom reproduces sexually, the size of the daughter cells decreases until diatoms are about 30% of their original size. At this point, they begin to reproduce asexually.
Answer the following statement true (T) or false (F)
Kinesin 1 is a motor protein molecule consisting of
a. two heavy chains. b. one heavy chain and two light chains. c. two heavy chains and two light chains. d. two heavy chains and four light chains. e. four heavy chains and four light chains.
A ________ is an organism whose body cavity forms between the body wall and the digestive system
A) sponge B) hermaphrodite C) nematode D) protostome E) deuterostome
The rigid chitinous exoskeleton of an arthropod has all of the following functions except it
A. prevents injury to the animal. B. impedes water loss. C. provides a place for muscle attachment. D. maintains a uniform size for all individuals of that species. E. protects the animal from predators.