Why is the cell (plasma) membrane composed of two phospholipids with the "heads" facing outwards? A)The cytoplasm and environment outside of the cell is made of water. The “head” of the molecules are attracted to the water. B) the tails are attracted to each other because of hydrogen bonding C) The cytoplasm and environment outside of the cell is made of carbohydrates. The “head” of the molecules are attracted to the carbohydrates. D) the tails are attracted to each other because of ionic bonding

the answer is either b, or c I'm not sure I'm sorry it's been a while for me

the growth of the plants is affected by the heat of the light. what is the student doing?

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.