Questions in Grade High-school

Questions in Grade High-school

[Done] 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.

[Done] 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

[Done] The atmosphere is considered _____ because of its ability to transport and distribute materials throughout the globe quickly. A. a superhighway B. a blanket C. stagnant D. a shield

[Done] 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

[Done] 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.

[Done] People build a dam to create a reservoir that supplies water to a nearby city. Describe two ways this action will likely affect the water cycle in the local environment.

[Done] 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

[Done] The Earth has fewer meteorite impacts because _____. A. of the Earth's atmosphere B. liquid water began to form C. the thicker atmosphere blocked the Sun's rays D. volcanic outgassing ceased

[Done] Which of the following ratios is equivalent to \( \frac{1}{\cos} \)?

[Done] Why is absolute dating more accurate than relative dating? Select one: A. Relative dating uses the half-life of an element. B. Absolute dating uses the half-life of an element. C. Relative dating compares the placement of fossils. D. Absolute dating uses more fossils than relative dating.