How do enzymes catalyze chemical reactions (don't just say "they lower the activation energy", give me specific mechanisms) ?

Grocery stores organize food according to food type-diary, frozen, bakery, and so on. This is an example of what? A. observations B. posing questions C. classifying D. inferences

If the mass of a material is 93 grams and the volume of the material is 17 cm3, what would the density of the material be?

Which of these infectious, viral diseases affects the immune system and can cause major damage to organs such as the liver and brain? A) AIDS B) syphilis C) diabetes D) Parkinson's disease

In a reverse fault, where does the hanging wall move relative to the footwall? a. upward c. horizontally b. downward d. stays the same

What is a phospholipid composed of? a. a nonpolar head and a polar tail b. a nonpolar head and tail c. a polar head and a nonpolar tail d. a polar head and tail

Which conclusion does the fossil record support? A. Species have changed over time. B. Traits acquired during a lifetime are passed to offspring. C. Earth's organisms have not changed over time. D.

Based upon the pH scale, a vegetable with a pH of 5.3 would be A. neutral. B. ionic. C. acidic. D. basic.

How could the loss biodiversity affect humans

What are nongerminating seeds

Which protist is multicellular, found in warm ocean waters and has a red color due to the red photosynthetic pigments in its cells?