Echinoderms are unusual invertebrates as they have all of the following except:a
an endoskeleton.
b. pentaradial symmetry.
c. a water vascular system.
d. pedicellariae present in some classes.
e. small disc-shaped flat bodies.
E
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You are studying a population of geese in which there are two color phases, brown and gray. Color in this species is controlled by a single gene, with brown dominant to gray. A random sample of 250 geese shows that 210 are brown. What percentage of the brown geese are heterozygous? (Assume that the population is in Hardy-Weinberg equilibrium.)
A. 36% B. 43% C. 48% D. 57% E. 84% Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the Hardy-Weinberg principle? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The protist that is most closely related to animals is the:
a. amoeba b. choanoflagellate c. dinoflagellate d. euglenoid e. paramecium
What type of metabolic pathway requires oxygen?
A) aerobic B) anaerobic C) photosynthetic D) fermentative
Figure 35.9B
The following question refers to the figure above of a section through bone.
DA blood vessel is indicated by the letter ____.
A. A B. B C. C D. D E. E