Judah Folkman performed an experiment in which he found that small tumors floating in the anterior chamber of the eye grew little, whereas a similar tumor implanted directly onto the iris grew to thousands of times its original size
These results supported his idea that continued tumor growth is dependent on requirement of tumor growth for
A) continued exposure to a carcinogen.
B) evasion of apoptosis.
C) angiogenesis.
D) metastasis.
E) a stepwise series of gene mutations.
Answer: C
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The necropsy (postmortem analysis) of a freshwater fish that died after being placed accidentally in saltwater would likely show that _____
A) loss of water by osmosis from cells in vital organs resulted in cell death and organ failure B) high amounts of salt had diffused into the fish's cells, causing them to swell and lyse C) the kidneys were not able to keep up with the water removal necessary in this hyperosmotic environment, creating an irrevocable loss of homeostasis D) the gills became encrusted with salt, resulting in inadequate gas exchange and a resulting asphyxiation E) brain cells lysed as a result of increased osmotic pressure in this hyperosmotic environment, leading to death by loss of autonomic function
In eukaryotes, genes involved in transcription and translation are derived from
A. ancient bacteria. B. primitive RNA. C. archaeal ancestors. D. mitochondrial genomes.
What provides a connection between two neurons?
A) a synapse B) a cell body C) an axon D) dendrites
If you were given a large showy flower with three petals, six stamens, and three carpels, would you consider it likely to be
A. a monocot. B. a hybrid. C. a eudicot. D. a gymnosperm. E. Amborella trichopoda.