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Questions in biology

📝 Answered - Of the procedures to analyze data listed, which one is most likely to result in an inaccurate prediction? A. Averaging B. Extrapolation C. Graphing D. Observation

📝 Answered - How does the carbon dioxide necessary for photosynthesis enter plants? A. Through their roots B. Through openings in the leaves called stomata C. The plants produce their own complete supply D. None of the above

📝 Answered - Organic macromolecules called lipids are insoluble in water, are often found in biological membranes and other waterproof coverings, and have the ability to store energy for extended periods of time.

📝 Answered - The cell is taking in substances through membrane proteins without any energy expenditure of its own. The substances naturally follow their concentration gradient. However, they must go through the protein channels because they are too large to squeeze through the cell membrane. This process is called: _____ Fill in the blank with the name of the process described.

📝 Answered - A single strand of DNA helix consists of 100 nitrogenous base pairs. If 36 of the bases are adenine and 24 are cytosine, how many should be thymine on the complementary strand? A. 36 guanine B. 36 thymine C. 40 guanine D. 40 thymine

📝 Answered - Most arthropods and some mollusks and tunicates have _____ circulatory systems, which means fluid transporting nutrients and oxygen flows directly into internal organs. A. closed B. nonexistent C. open

📝 Answered - What hypothesis did Miller-Urey test in their experiment? A) Organic molecules can form in a reducing atmosphere. B) Earth is a primordial soup. C) Organic molecules cannot survive in a reducing atmosphere.

📝 Answered - The Mono Lake ecosystem is being destroyed by dropping water levels and increasing salinity because ______. A. there is a persistent drought B. this water is used for irrigation C. snowmelt is diverted to other areas D. there is excessive evaporation

📝 Answered - Which characteristics of fish might allow them to survive?

📝 Answered - A population of bacteria is treated with an antibiotic. Because of variation in the population of bacteria, what is a possible outcome of the treatment? A. The population will increase rapidly. B. All of the bacteria will be resistant to the antibiotic. C. The population will be better able to obtain a food source. D. Some of the bacteria may be resistant to the antibiotic and survive.