A population carries two alleles for a trait in which T is dominant and t is recessive. In the Hardy-Weinberg equation, 2pq represents the
A) proportion of homozygous dominant individuals.
B) decrease in heterozygous individuals.
C) proportion of homozygous recessive individuals.
D) increase in homozygous individuals.
E) proportion of heterozygous individuals.
E
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The subunits (building blocks) of proteins are
A. nucleotides. B. phospholipids. C. amino acids. D. carbohydrates.
These dead cells conduct water and minerals
and have pits in their cell walls. This cell is
a. a sieve-tube member. b. a sclerenchyma. c. a vessel member. d. a tracheid. e. more than one of these
Four of the five answers listed below are barriers to invasion. Select the exception
a. intact skin b. mucous membrane c. gastric juices d. blood plasma e. lysozyme
Which of the following correctly traces the pathway of urine flow in vertebrates?
a. Collecting tubule ureter bladder urethra b. Renal vein ureter bladder urethra c. Nephron urethra bladder ureter d. Cortex medulla bladder ureter e. Renal pelvis medulla bladder urethra