Which of the following are single-celled microscopic members of the animal kingdom?

a. Flatworms
b. Rickettsiae
c. Helminths
d. Protozoa


d. Protozoa

Biology & Microbiology

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Photosynthesis occurs in ____, while cellular respiration occurs in ____

a. plants; animals b. animals; plants

c. plants and animals; animals d. plants; plants and animals e. plants and animals; plants and animals

Biology & Microbiology

What are skeletal muscles attached to the bones by?

What will be an ideal response?

Biology & Microbiology

One of your closest fish relatives is the coelacanth. Where is its equivalent to your forearm?

A. The pelvic fin lobe B. The operculum C. The claspers D. The gill arch extensions E. The pectoral fin lobe

Biology & Microbiology

In accordance with the principle of parsimony, scientists

A) propose phylogenetic trees that minimize the number of evolutionary changes. B) adopt phylogenetic trees in which adaptations repeatedly arise, disappear, and reappear. C) construct phylogenetic trees with many small clades rather than with a few major clades. D) utilize the Linnaean system of nomenclature rather than common names.

Biology & Microbiology