Compared with sponges, cnidarians have a wider array of cell types permitting more sophisticated tissue functions. These functions include (select all that apply):
A. secretion of digestive enzymes.
B. muscle contraction/movement.
C. the ability to sense the environment via a
network of nerve cells.
D. the ability to communicate within the
organism using hormones.
E. none of these
A,B,C
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Which of the following does not contribute to the formation of dead zones?
A. ocean acidification B. fertilizers from agricultural runoff C. eutrophication D. decomposition E. All of the answer options contribute to the formation of dead zones.
Which process is exemplified by the opening of flowers in the late afternoon in the aptly named four-o’clock plant (Mirabilis jalapa)?
1.Circadian rhythm 2.Nasticity 3.Photoperiodism 4.Vernalization
How can PCR be used to induce site-specific mutations in DNA?
What will be an ideal response?
Scorpions have a prosoma, pedipalps that are modified into claws, and chelicerae. Which taxonomic group are they a member of?
A. Myriapoda B. Crustacea C. Hexapoda D. Chelicerata