The base of the food web in sandy intertidal areas exposed to wave action is detritus, not algae. What prevents seaweed from having the role of primary producer in this habitat?
What will be an ideal response?
Attached algae are not common in these areas because there is no permanent hard substrate for holdfast attachment. As a result, animals must rely on detritus produced from offshore kelp beds or benthic algae or detritus formed in nearby estuaries. In contrast, rocky shores are covered with algae, which can be grazed directly by rocky intertidal animals.
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How did Bateson and Punnett's work with comb morphology in chickens differ from the dihybrid work of Mendel?
A. They were working with sex-limited traits. B. Their F2 offspring displayed 4 unique phenotypes, not the four combinations of two phenotypes expected in a Mendelian cross. C. ½ of their combinations were lethal. D. The expression of their trait varied by the environment in which the chickens were raised.
Soluble fiber is important in your diet as it tends to decrease your cholesterol level. It does so by
a. binding to and eliminating bile acids. b. binding to and eliminating cholesterol. c. decreasing your HDLs. d. increasing your HDLs e. decreasing your LDLs.
The bond in table salt (NaCl) is ____
a. polar b. ionic c. covalent d. double e. nonpolar
Growth in population is a convenient way to express the rate of change within a population
1.True 2.False