The knot of capillaries in a nephron, where filtration of blood occurs, is the:
A) proximal tubule.
B) collecting duct.
C) bowman's capsule.
D) distal tubule.
E) glomerulus.
Answer: E
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The source of diversity for B and T cell
receptors is a. mitosis. b. meiosis. c. transcript processing. d. random recombination of genes. e. gene transcription.
As you look through the microscope, you observe a liver cell just beginning to enter mitosis. Identify the steps of mitosis that are listed in correct order.
A. prophase, B. metaphase, C. anaphase, D. telophase E. all of the above
In Drosophila, assume that the gene for scute bristles (s) is located at map position 0.0 and that the gene for ruby eyes (r) is at position 15.0. Both genes are located on the X chromosome and are recessive to their wild-type alleles
A cross is made between scute-bristled females and ruby-eyed males. Phenotypically wild-type F1 females were then mated to homozygous double mutant males, and 1000 offspring were produced. Give the phenotypes and frequencies expected.
situation in which a genetically distinct local population is established by a few colonizing individuals is know as
A. fitness. B. gene pooling. C. genetic drift. D. the founder effect.