If placed in tap water, an animal cell will undergo lysis, whereas a plant cell will not. What accounts for this difference?
A) expulsion of water by the plant cell's central vacuole
B) the relative impermeability of the plant cell membrane to water
C) the relative impermeability of the plant cell wall to water
D) the relative inelasticity and strength of the plant cell wall
D
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A metabolic reaction requires 10 units of enzymatic activity to proceed. If a dominant allele D can generate 8 units of enzyme and a recessive allele d can generate 2 units of enzyme, what can be said of the dominant wild-type allele?
What will be an ideal response?
Which statement about bilateral symmetry is FALSE?
a. Bilateral symmetry evolved in cnidarians. b. Bilateral animals tend to have cephalization. c. Bilaterally symmetrical animals has three axes. d. Bilateral symmetry animals have a mesoderm. e. Animals with bilateral symmetry have dorsal and ventral surfaces.
Where are ion channels localized?
A) in the cytoplasm B) on the intracellular surface of plasma membranes C) spanning plasma membranes D) on the extracellular surface of plasma membranes
Which hormone from the adrenal cortex of the kidneys will cause the distal convoluted tubules to reabsorb more sodium ions?
A. angiotensin II B. aldosterone C. ADH D. angiotensinogen E. renin