Senescence means that
A. All of the answer choices are correct.
B. a plant is aging towards death or dormancy.
C. a plant is doing less synthesis of molecules.
D. plant tissues are breaking down more molecules.
E. a plant is potentially going through leaf abscission.
A. All of the answer choices are correct.
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Refer to the figure. At the beginning of the experiment,
A) side A is hypertonic to side B. B) side A is hypotonic to side B. C) side A is isotonic to side B. D) side A is hypertonic to side B with respect to glucose. E) side A is hypotonic to side B with respect to NaCl.
Infertility affects around one in ________ males.
A) 10 B) 25 C) 50 D) 100
Identical twins can result from
a. the fusion of two sets of identical gametes. b. a division of a zygote into two separate cells that develop into two separate embryos. c. the fusion of two paternal gametes with a single maternal gamete that then divides. d. a lack of chromosomal separation during meiosis resulting in gametes that are diploid and don't need to be fertilized. e. a mechanism that is not understood.
Which type of bond represents a weak chemical bond?
a) nonpolar covalent bond b) polar covalent bond c) hydrogen bond d) ionic bond