In sponges, spicules are secreted by amoeboid cells

____________________ Indicate whether the statement is true or false.


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Biology & Microbiology

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Which of these groups is least closely related

to the other four? a. ciliates b. finoflagellates c. diplomonads d. apicomplexans e. all of the above are equally closely related

Biology & Microbiology

A significant reduction in the amount of which gas would allow more ultraviolet radiation to reach Earth's surface?

a. oxygen b. methane c. ozone d. cyanide e. carbon dioxide

Biology & Microbiology

With the E. coli trp operon where both repression and attenuation occur, the extent of regulation achieved by repression is ________ the extent of regulation achieved by attenuation.

A. greater than B. the same as C. less than D. Repression is not used in the regulation of the E. coli trp operon.

Biology & Microbiology

Too much exercise and not enough recovery time is referred to as:

What will be an ideal response?

Biology & Microbiology