3. A certain atom has an atomic number of four. How many protons does it have?

A 8

B 4

C2

DO

What can a fossil tell us about a rock?

what would happen to the container of ice if it were touching the container of hot water describe what will happen in the term of heat transfer and changes in temperature in both containers

Hemoglobin is a protein that carries oxygen around your body. what is hemoglobin made from? A. Fatty acids B. Nucleic acids C. Monosaccharides D. Amino acids

The word carbohydrate is derived from carbon and hydrate (water). Explain why this combination correctly describes this chemical group?

1. What do Paul and his father build in the cabin? A. a radio B. a clock C. an engine D. a fire

Eubacteria and Archaebacteria can reproduce in a short amount of time. Why can this be considered a negative thing?

The catalytic efficiency of many enzymes depends on pH. Chymotrypsin shows a maximum value of kcat/KM at pH 8. Detailed analysis shows that kcat increases rapidly between pH 6 and 7 and remains constant at higher pH.

What type of bond forms between a slightly positive hydrogen atom in one molecule and a slightly negative atom in another molecule

What type of soil permeability is most desirable for agricultural land? very slow rapid moderate?

What feature of alcohol fermentation makes it more suitable for the baking process than lactic acid fermentation? A. Alcohol fermentation is a faster process than lactic acid fermentation. B.