What defines a mixture?

A.

can be broken down into its basic substances through physical means

B.

described by a chemical formula

C.

cannot be broken down into simpler substances

D.

created through a chemical reaction

What is the primary difference between a peptide hormone and a steroid hormone?

What are carbohydrates broken down into during digestion?

An organism genotype is its 1. Genetic makeup 2. feather color 3. physical appearance 4. Stem height

Which of the following is the best definition of Bias

Enzyme Enzyme a. Write one or two sentences explaining how enzymes work, using vocabulary words from the diagram.

When fats first reach the duodenum what their presence stimulates the release of which hormone from the intestinal mucosal cell?

Ocean-dwelling chemoheterotrophic bacteria that generate energy via aerobic respiration are dependent on the presence of photoautotrophs like cyanobacteria because:

Nucleotide are composed of phosphate group, a sugar, and a nitrogenous base. DNA is made up of long strands of nucleotide. which part if the above molecule can differ between nucleotide? A. the sugar B. the phosphate group C. the nitrogen group D.

2 atp molecules are needed to start A) the krebs cycle B) gyycolysis C) the electron transport chain D) none of the above

If earth is about 4.5 million years old which statement is true