Which of the following is mismatched?

A. endoskeleton - echinoderms
B. hydraulic skeleton - earthworm
C. exoskeleton - vertebrates
D. exoskeleton - crustaceans
E. hydraulic skeleton - jellyfish


Answer: C

Biology & Microbiology

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Some researchers think H. floresiensis is a

more common early human with a genetic or nutritional disorder. What other early human was thought of this way when their fossils were first discovered? a. H. neanderthalensis b. H. erectus c. H. sapiens d. H. ergaster e. H. habilis

Biology & Microbiology

A sick child may have influenza or RSV. These virus infections have different treatment options, so the physician requests antibody titer tests. The results are as follows: anti-influenza antibodies are primarily IgM, and anti-RSV antibodies are all IgA and IgG. Which of the following is the most appropriate interpretation?

A) The child has a current RSV infection and was previously exposed to influenza. B) The child currently has influenza and has previously been exposed to RSV. C) The child has concurrent influenza and RSV infections. D) The child has neither influenza nor RSV. E) The results do not provide sufficient data to draw a conclusion.

Biology & Microbiology

3. Humans belong to which kingdom?

Animals Eukarya Prokaryotes Fungi

Biology & Microbiology

Resistance activities increase muscle mass by ____

a. stretching muscles b. increasing the number of mitochondria in cells c. encouraging the synthesis of more actin and myosin filaments d. encouraging the production of more muscle fibers e. converting red fibers to white fibers

Biology & Microbiology