Which type of cnidarian does not have a nervous system?

a.

Corals

c.

Jellyfish

b.

Sponges

d.

Anemones

Gas exchange in an echinoderm takes place through A. book lungs. B. skin gills. C. lungs. D. none of the above.

2. Why are enzymes necessary in order for chemical reactions to occur in living systems and organisms?

If an organism is diploid and a certain gene found in the organism has 18 known alleles (variants), then any given organism of that species can/must have which of the following?

Ashton loves to stand on his tiptoes. What type of special movement best describes the elevation of the heel and proximal portion of the foot when a person stands on tiptoes?

What kind of animal tissue functions in the support and linking of other tissues

Which of the following is NOT a red flag about your alcohol consumption?

What is the final energy source that the muscles need in order to move? fat sugar ATP glycogen

During ages six to eleven, Freud's latency period, what do experts believe happens to the libido? A. That it is channeled into self-development B. That it is only seen in small, private groups with peers C.

Name the four classes of organic compounds containing carbon

Arnold is a weightlifter being retested for after his urinalysis was positive for anabolic steroids. What kind of test is being used?