When the net movement of water in and out a cell is zero, that solution is said to be:
a. osmotic
b. isotonic
c. hypotonic
d. hypertonic
e. pressurized
b
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The Burgess Shale preserves a remarkable fossil record of:
A. delicate flowers and mushrooms from the early invasion of land plants. B. marine life during initial diversification of animals in the Cambrian Period 505 million years ago. C. plants, insects, and mammals around 50 million years ago, as the age of mammals began. D. the tracks of dinosaurs walking on land. E. molecular evidence of bacteria and other organisms.
A cell cycle checkpoint for S phase would likely inhibit progression through the cell cycle if _____
a. there are not enough proteins for division to continue b. ATP supply in the cell is low c. there is DNA damage d. the temperature of the cell is too low e. surrounding cells are dividing
Which statement regarding myelogenous leukemias is true?
A. They originate from a common colony-forming cell line. B. They originate from a common myeloid precursor cell. C. They originate from a common erythroid precursor cell. D. They originate from a common megakaryoc
Which type of chromosome mutation increases the amount of genetic material for all chromosomes?
A. aneuploidy B. translocation C. inversion D. transversion E. polyploidy