The spread of a cancer from one site to others in
the body is known as
a. a benign tumor.
b. metastasis.
c. a malignant tumor.
d. remission.
e. both a benign tumor and a malignant tumor.
Answer: b
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Which of the following are consequences of Arctic ice melting due to global warming?
a. arctic animals are losing suitable habitat b. polar bears are in poorer condition and their weight has decreased over the last 30 years c. more solar radiation is being absorbed by the ocean d. the temperature is increasing in the Arctic at an accelerated rate e. all of the above
The theory of aging that posits that aging is caused by irreparable damage to the cells, tissues, and organs of an organism brought about by such things as errors in protein synthesis and the accumulation of toxic metabolites is the ________
A) theory of senescence B) rate of living theory of aging C) evolutionary theory of aging D) particulate theory of aging
The two strands of a DNA double helix are held together by _____ that form between pairs of nitrogenous bases
a. ionic bonds b. covalent bonds c. hydrophilic interactions d. S—S bonds e. hydrogen bonds
Roundworms and arthropods are both ecdysozoans. This means they
A. have a body cavity that is completely lined with mesoderm. B. have the anus arise at or near the blastopore. C. have a trochophore larvae. D. periodically shed their outer covering. E. No answer choice is correct.