Which of the following statements is CORRECT about active transport?
A. It requires energy.
B. It is an active process in which molecules move from a region of lower concentration to one of higher concentration.
C. It requires integral proteins.
D. It is necessary to maintain solute gradients across a membrane.
E. All of the choices are correct.
E. All of the choices are correct.
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Axillary buds _____
A) are produced by the cork cambium B) have dormant meristematic cells C) are composed of a series of internodes lacking nodes D) give rise to secondary xylem E) do not form a vascular connection with the primary shoot
People adopt a vegetarian diet for a variety of reasons. Justify such a diet using the laws of energy and the idea of efficient energy usage
What will be an ideal response?
Based on the chart, which of the following would be the most reasonable plan for the students to follow?
(A) Searching horizontal rock layers in any class of rock and trying to find those that contain the greatest number of fossils (B) Collecting fossils from rock layers deposited prior to the Permian period that contain some early vertebrate bones (C) Looking in sedimentary layers next to bodies of water in order to find marine fossils of bivalves and trilobites (D) Using relative dating techniques to determine the geological ages of the fossils found so they can calculate the rate of speciation of early organisms
In humans, X-linked genetic diseases
a. are associated with autosomes. b. tend to be expressed more in females than males. c. only affect males. d. tend to be expressed more in males than in females.