Which of the following is true of exponential growth?
A) Exponential growth resembles a straight line when plotted on a graph.
B) Exponential growth resembles an S-shaped curve when plotted on a graph.
C) Exponential growth occurs when there are many environmental limits to reproduction.
D) Exponential growth is growth that continues accelerating with time.
Answer: D
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Which of these gives the correct order from large to small?
a) muscle ? muscle cell ? myofibril ? sarcomeres ? filaments b) muscle ? sarcomeres ? myofibrils ? actin filaments ? myosin filaments c) muscle ? myofibrils ? sarcomeres ? muscle cells ? filaments d) muscle ? muscle fibers ? sarcomeres ? filaments ? myofibrils e) muscle cells ? myofibrils ? filaments ? sarcomeres
An abnormal mass of tissue is a tumor.
a. true b. false
There is a mutation in the operator of the trp operon in a cell such that the trp repressor is unable to bind to the operator. If tryptophan is added to the cell, what will happen?
A) Tryptophan will bind to the repressor, and trp enzymes will be produced. B) Tryptophan will bind to the repressor, and trp enzymes will not be produced. C) Tryptophan will not bind to the repressor, and trp enzymes will be produced. D) Tryptophan will bind to the operator, and trp enzymes will be produced.
Which statement regarding birth control is true?
A) The most widely used birth control pills contain a combination of FSH and LH. B) Natural family planning is generally reliable. C) Morning-after pills taken within 3 days of unprotected intercourse prevent fertilization or implantation about 75% of the time. D) Birth control pills work primarily by preventing fertilization and implantation.