mRNA
What will be an ideal response?
DNA
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Which molecule comprises the largest proportion of the carbon reservoir in the ocean?
a. carbon dioxide b. carbonic acid c. bicarbonate ion d. carbonate ion
Lichens take up nutrients and pollutants from airborne dust, so many cannot survive where the level of air pollution is high. The U.S. Forest Service monitors lichens on tree trunks as part of its program to assess the health of forest communities. Lichen is a(n) ____
a. pioneer species b. indicator species c. primary succession species d. keystone species e. exotic species
Which action that spreads pathogens is the simplest to prevent?
1.inhalation
2.indirect contact
3.contact with a vector
4.direct contact
Tumors that are harmful, non-encapsulated growths of cells are known as
A. benign. B. malignant. C. metastasized. D. carcinogenic.