The renal pelvis is continuous with the
A. nephrons.
B. ureter.
C. bladder.
D. urethra.
E. renal cortex.
Answer: B
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Chitin, a modified form of cellulose, is not only cross-linked with proteins but its glucose units are modified with atoms of:
A. nitrogen. B. hydrogen. C. oxygen. D. sulfur. E. phosphorous.
Which gland stores hormones produced by another gland, rather than producing hormones itself?
a. hypothalamus b. thyroid c. posterior pituitary d. pancreas
From the relative positions of genes on the
chromosome illustration below, we expect a. the highest frequency of crossing over between genes A and D. b. more crossing over between C and D than between A and B. c. more crossing over between A and B than between B and C. d. the lowest frequency of crossing over between B and C. e. none of these.
Which of the following is NOT true concerning mitosis?
A. It insures the immortality of the genetic information possessed by an organism. B. The DNA molecule replicates before any chromosomes can be seen. C. It is the process that heals a wound. D. It accounts for most of the increase in size of growing plants and animals.