Which of the following organisms could result from a developing embryo where the mouth

develops second?



a. earthworm
b. clam
c. beetle
d. starfish


D

Biology & Microbiology

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Indicate whether the statement is true or false.

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Prior to the Mesozoic Era, the primary photosynthesizers in the ocean were the cyanobacteria and the diatoms

A. true B. false

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How many rounds of cell division occur in mitosis?

a. 0 b. 1 c. 2 d.3

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In humans, the _________ determines the sex of the offspring because __________.

A. male ... the sperm can fertilize either a female egg or a male egg B. female ... only the female has two functional sex chromosome C. male ... the male can contribute either an X or a Y chromosome D. chromosome contribution from both parents ... the offspring uses all the parents' chromosomes

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