Answer the following questions true (T) or false (F)
1. Diatomaceous earth is composed of "skeletons" of the cell walls of protozoa.
2. Viruses cause most human cancers.
3. Most viruses cannot be seen by light microscopy.
1. FALSE
2. FALSE
3. TRUE
You might also like to view...
Measurements of the amount of DNA per nucleus were taken on a large number of cells from a growing fungus. The measured DNA levels ranged from 3 to 6 picograms per nucleus. In which stage of the cell cycle did the nucleus contain 6 picograms of DNA?
A) G0 B) G1 C) S D) G2 E) M
You find a mutant Drosophila larva that is lacking anterior structures. You know that this embryo had normal amounts of Bicoid protein. What other type of mutation could cause this result?
A. A hunchback mutation that inhibits Hunchback production. B. A hunchback mutation that causes Hunchback overproduction. C. A maternal effect gene mutation that inhibits the production of a maternal gene product. D. A segmentation gene mutation that inhibits production of a segmentation gene product. E. A segmentation gene mutation that causes the overproduction of a segmentation gene product.
During which stage of the cell cycle are chromosomes duplicated?
a. mitosis b. S phase c. interphase d. cytokinesis
A person with which blood type can receive a transfusion from anyone else regardless of their blood type?
a. Type A b. Type B c. Type O d. Type AB e. Type C