In which two phases of mitosis does the nuclear membrane appear or disappear?
A. prophase and metaphase
B. metaphase and anaphase
C. prophase and anaphase
D. prophase and telophase
E. anaphase and telophase
Answer: D
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The chelicerates (select all that apply)
A. include spiders, scorpions, and their relatives. B. are known for their venoms. C. were among the first animals to invade land around 400 million years ago. D. have pincer-like claws, antennae, and wings. E. are ecologically diverse, particularly in their food habits, with different groups specializing on a wide variety of plant and animal foods.
Found mostly in freshwater, members of this Lophotrochozoan phylum have a wheel-like, ciliated
food-gathering organ around their head called a corona. Some members of this phylum make extensive use of parthenogenesis for reproduction.
a. Rotifera b. Mollusca c. Platyhelminthes d. Annelida e. Nemertea
Homeotic genes of Drosophila:a
cause cells of the same type to produce differing amounts of gene products. b. specify the developmental plan(s) for each segment. c. are expressed in only one sex in any particular species. d. are always the sites of lethal mutations. e. control developmental timing.
The ________ are the 22 pairs of chromosomes not including the X and Y chromosomes
Fill in the blank(s) with correct word