Cancers that metastasize and invade normal tissues to impede their functions are called
A) benign tumors.
B) keratosis.
C) malignant tumors.
D) in situ cancer.
E) neoplasm.
C
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Which of the following is an advantage of sexual reproduction?
a. It prevents adaptation in a changing environment. b. It eliminates the possibility of harmful traits being passed on. c. It passes on half of a parent’s genome. d. It reduces genetic variation, which may be useful in the future. e. It yields offspring with novel combinations of traits.
Radioisotopes
a. are unstable and emit energy and particles to stabilize themselves. b. are different elements from the "standard" elements. c. are very stable and do not change over time. d. contain more electrons than the "standard" element. e. contain less electrons than the "standard" element.
Red sea urchins and purple sea urchins occur in the same area and release their gametes at the same time into the ocean. The sperm and eggs often bump into each other but do not create hybrids because of incompatible proteins on their surfaces. This is an example of:
A) temporal isolation B) habitat isolation C) behavioral isolation D) mechanical isolation E) gametic isolation
Which of the following statements is false?
A) Immunofluorescence is when fluorochromes bind to a specific target and fluoresce after exposure to UV light. B) Fluorochromes can be natural or synthetic. C) Scanning electron microscopy provides information about surface structures. D) Transmission electron microscopy provides information about internal structures. E) Fluorescence microscopy is when fluorochromes stain a sample so it will fluoresce when exposed to UV light.