Which of the following is used to cause flocculation?

A. charcoal
B. methane
C. chlorine
D. aluminum potassium phosphate (alum)


D

Biology & Microbiology

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What key assumption of the endosymbiotic theory is observed in living animals?

What will be an ideal response?

Biology & Microbiology

On which continent would you have seen the very earliest members of Homo sapiens?

A. Europe B. Africa C. Australia D. Asia

Biology & Microbiology

Which animal obtains additional oxygen by cutaneous respiration?

A. birds B. shrews C. frogs D. crocodiles E. turtles

Biology & Microbiology

In a circulatory system with double circulation, __________.

a. blood is pumped at two separate locations as it circulates through the body b. blood is pumped twice by the same heart in order to complete a cycle of picking up oxygen and delivering it to the tissues c. there is a countercurrent exchange in the gills d. hemolymph circulates both through a pumping blood vessel and through body sinuses e. there are always two atria per heart ventricle

Biology & Microbiology