The most successful phylum in regards to diversity and number of species is

A. Nematoda.
B. Mollusca.
C. Platyhelminthes.
D. Echinodermata.
E. Arthropoda.


E. Arthropoda.

Biology & Microbiology

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When body temperature drops below normal, a person starts shivering uncontrollably. This is an example of negative feedback.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Your child has developed an eye infection with a yellowish discharge.  You predict that this is a case of ________.

A. rubella B. helminth infection C. herpes keratitis D. bacterial conjunctivitis E. trachoma

Biology & Microbiology

A competitive inhibitor interferes with:

A. the oxidized site of the enzyme so a substrate cannot bind B. the active site of the enzyme so a substrate cannot bind C. the reduced site of the enzyme so a substrate cannot bind D. the allosteric site of the enzyme so a substrate cannot bind E. the repressor site of the enzyme so a substrate cannot bind

Biology & Microbiology

Birds, like mammals, can regulate their body temperatures within close limits. Therefore birds and mammals are called

A. endothermic. B. heterothermic. C. ectothermic. D. poikilothermic.

Biology & Microbiology