A(n) morphogen is a chemical agent that affects the differentiation of cells and the development of form. Indicate whether the statement is true or false


True

Biology & Microbiology

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Collar cells are found in:

a. segmented worms. b. sponges. c. cnidarians. d. flatworms. e. nematodes

Biology & Microbiology

Urine contains antimicrobial substances

Indicate whether this statement is TRUE or FALSE.

Biology & Microbiology

A pine tree is

a. an angiosperm. b. a haploid plant body. c. a sporophyte. d. the dependent stage in the conifer life cycle. e. all of these.

Biology & Microbiology

Refer to Figure 30-1. The development pattern labeled Type A is characteristic of:

a. ctenophores.
b. chordates.
c. cnidarians.
d. annelids.
e. echinoderms.

Biology & Microbiology