Mollusks have all of the following EXCEPT 

A. larvae.
B. foot.
C. mantle.
D. tube feet.


D. tube feet.

Biology & Microbiology

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Nitially, organisms were classified into only two kingdoms (by Darwin & Haeckel). The individual who developed the five-kingdom system, which is considered traditional today was

A) Carl Woese. B) Louis Pasteur. C) Stephen Hawking. D) Robert Whittaker.

Biology & Microbiology

A typical sponge is best described as a

A) slow-moving suspension feeder with a true coelom. B) sessile suspension feeder with bilateral symmetry. C) slow-moving carnivore with no true tissues or symmetry. D) sessile suspension feeder with no true tissues or body symmetry.

Biology & Microbiology

Which of the following statements about RNA processing in eukaryotes is INCORRECT?

A. Introns are simply excised out of pre-mRNA to produce the mature mRNA. B. A complex composed entirely of proteins is used to remove introns from the pre-mRNA. C. A poly A tail is added on to the 3? end of the mRNA. D. A 7-methylguanosine cap is added on to the 5? end of the mRNA. E. Processing occurs in the nucleus.

Biology & Microbiology

Crossing over in prophase I and ________ in metaphase I increase the genetic variation from one generation to another

Fill in the blank(s) with correct word

Biology & Microbiology