Which of these is a density-dependent factor that controls the size of a population?
a. wind velocity
b. light intensity
c. nutrient supply
d. rainfall
e. wave action in an intertidal zone
C
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Carrier proteins are saturated at which point?
The diagram shows the rate of diffusion into a cell using carrier proteins.
A. 1
B. 2
C. 3
D. 4
Clarify Question
· What is the key concept addressed by the question?
· What type of thinking is required?
Gather Content
· What do you know about carrier proteins? What other information is related to the question?
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?
A vascular bundle:
A. contains xylem and phloem B. is not found in leaves C. is usually scattered in the stem of a eudicot D. is on the outer surface of a root E. is very distinct in the apical meristem
Which of the following is true of the adrenal medulla?
1.It controls sodium and water reabsorption in kidneys. 2.It releases norepinephrine into the blood. 3.It secretes sex hormones. 4.It decreases cortisol level in the blood.
Which statement with regard to Sertoli cells is FALSE?
a. They secrete hormones. b. They are joined by tight junctions. c. They form a blood-testis barrier. d. They phagocytize discarded sperm cytoplasm. e. They facilitate the movement of sperm into the blood