Vaccines are effective in preventing diseases because they? A. Interfere with the release of suppressor T cells B. Are antibodies directed against specific pathogens C. Contain specific B cells and T cells D. Trigger antibody formation

Which type of tissue is specialized for contraction?

Drugs in which measurement system may be derived from animal sources that could have different strengths of raw materials?

What would a scientist predict might happen in a region where there is a high amount of acid rain? a. vegetation and aquatic life damage c. contamination of drinking water b. building and monument erosion d. All of the above

The genetic code is based upon the reading of how many bases at a time?

Coal is formed when O A sediments cover dead marine organisms and heat converts them into complex, energy-rich carbon molecules. O B deposits of methane are subjected to high pressure until they condense into crystals.

If a cell is exposed to a chemical that inhibits the production of spindle fibers as the cell is preparing for mitosis, what would most likely happen?

In angiosperms, what is the name of the outer epidermal layer that protects the plant body? A. Vascular tissue B. Dermal tissue C. Ground tissue

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Photosynthesis a) a process that uses sunlight to synthesize foods from carbon dioxide and waterchloroplast b) an organelle that contains chlorophyll and in which photosynthesis takes placechlorophyll c) a green pigment present in all plants that

Summarize the steps of the scientific method.