Which sentence characterizes cancer cells?
a. Tumours formed by cancer cells remain encapsulated and grow in only one location.
b. Cancer cells form tumours that strongly adhere to surrounding tissues.
c. Cancer cells display uncontrolled cell division.
d. Mitosis is strictly regulated in cancer cells.
Answer: c. Cancer cells display uncontrolled cell division.
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Sometimes atoms gain or lose particles. The loss of which of the following would result in a change of atomic mass?
A. neutron B. proton C. electron D. a and b E. b and c
Close interactions that have evolved over time between species are called ____
Fill in the blank with the appropriate word.
The nucleocapsid is composed of
A. DNA and RNA and protein. B. DNA or RNA and protein. C. protein located in the nucleus. D. nucleic acid in the ribosome.
Serotonin is produced from the amino acid tryptophan.
a. true b. false