Which scenario illustrates a selfish herd?
a. In most wolf packs, one dominant male breeds with one dominant female.
b. Lions are social animals who cooperate in catching prey.
c. When threatened by wolves, musk oxen stand back to back, presenting an imposing display of sharp horns.
d. Chimpanzees learn by imitation in a group.
e. A pair of breeding herring gulls will cannibalize the eggs and even the chicks of their neighbors.
c
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If an enzyme is bound by an allosteric activator, the enzyme will convert from a low-affinity state to a high-affinity
state.
Indicate whether the statement is true or false.An atom that carries a charge is called a(n) ____
a. ion b. molecule c. compound d. element e. microelement
When would an experimental result be considered statistically significant?
A) The experiment is double blind. B) Experimental and control subjects are randomly assigned. C) The result is unlikely to be due to chance alone. D) The result supports the hypothesis being tested.
Draw a cladogram that for the following animals: sponges, cnidarians, flatworms, echinoderms, chordates, molluscs,
annelids, nematodes, and arthropods. On your cladogram indicate the points where the following evolved: 1) true tissues, 2) bilateral symmetry, 3) three germ layers, 4) segmentation, 5) protostome development, and 6) deuterostome development. What will be an ideal response?