All of the following are recommended ways to reduce the risk of developing cardiovascular disease EXCEPT which one?
A) reduce fat and cholesterol intake
B) reduce or quit smoking
C) engage in regular moderate exercise
D) older adults — use hormone replacement therapy
E) avoid chronic stress
D
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It is often said that development is a two-step process. What two steps are likely to be referred to here?
What will be an ideal response?
The researchers continued to characterize the new phosphatase. When the total concentration of phosphatase [Et] is at 2 nM, and the concentration of substrate, phosphotyrosine, is at 30 µM, then V0 = 600 nM s-1
What is the Km for this phosphatase? A. 1 µm B. 10 µm C. 100 µm D. 1 µm s-1 E. 1 µm s-1
The distinct layers of stratified lichen are organized with the photosynthetic species ________
a. sandwiched between layers of fungi b. against the rock or other substrate the lichen is growing upon c. growing beside, but in contact with, the fungus d. on the outside
A long-term study on guppies illustrates the effect of predation on life history traits. In this study, what occurred when guppies from streams with cichlids (prey on larger guppies) were moved to streams with killifish (prey on smaller guppies)?
a. Guppies became larger in one generation. b. Guppies became smaller in one generation. c. Guppies became larger over several generations. d. Guppies became smaller over several generations. e. Guppies did not change size.