A planula is a ________
a. motile ciliated larva that will settle and grow into a polyp
b. reproductive polyp on a colonial hydroid
c. barbed thread of a nematocyst
d. male medusa
a
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The longer an animal's gut, the more time it takes for material to pass through, and the more processing can occur. Therefore meat eating mammals typically have shorter guts than grazers. Why?
What will be an ideal response?
Which of the following is a protective structure where egg cells are formed in bryophytes and some other plants?
a. stoma b. strobilus c. sporangium d. archegonium
A certain type of congenital deafness in humans is caused by a rare autosomal dominant gene. In a mating involving a deaf man and a deaf woman, could all the children have normal hearing?
A) No, because it is dominant. Children always get the dominant alleles. B) Yes, because traits assort independently. C) No, because children favor their parents. D) Yes, because it must be recessive if it's rare. E) Yes, assuming that the parents are heterozygotes (because the gene is rare), it is possible that all of the children could have normal hearing.
__________ is the universal solvent.
Fill in the blank(s) with the appropriate word(s).