Which of the following statements about cancer is FALSE?
A. It is characterized by uncontrolled cell division.
B. Over 1 million Americans are diagnosed with cancer each year.
C. Most cancers involve genetic changes that are passed from parent to offspring.
D. At least 80% of all human cancers are related to exposure to carcinogens.
E. It is caused by an accumulation of mutations.
C. Most cancers involve genetic changes that are passed from parent to offspring.
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The impacts of the microbial types that inhabit cross-sections of water sediment are vast. Consider that sediments deep beneath water surfaces are home to perhaps ________ of the world's bacterial and archaeal biomass.
A. 50% B. 10% C. 20% D. 95%
What is the primary method by which zebra mussels have traveled beyond the Great Lakes?
a. attached to animals b. attached to boats c. attached to plants d. via water currents
Cells removed from callus that can grow into plantlets illustrates that differentiated cells can be returned to a
totipotent state.
a. True b. False
Which is not a characteristic of fungi?
A. Fungi are photosynthetic. B. Fungi can use a wide variety of nutrients. C. Fungi include single-celled and filamentous forms. D. Fungi are heterotrophs. E. Fungal cells have cell walls.