Biology

2. A group of similar organisms that can breed and produce fertile offspring
4. Attraction between molecules of the same substance
8. A molecule that is a constituent of the inner bilayer of biological membranes, having a polar, hydrophilic head and a nonpolar, hydrophobic tail
12. A double sugar, consisting of two monosaccharides joined by dehydration synthesis.
14. Energy needed to get a reaction started
15. Water fearing
17. A subatomic particle that has no charge and that is found in the nucleus of an atom
19. lipid molecule with four fused carbon rings
20. A type of protein that speeds up a chemical reaction in a living thing

1. A chemical substance that is present at the start of a chemical reaction
3. Carbohydrates that are made up of more than two monosaccharides
5. A group of ecosystems that share similar climates and typical organisms
6. the energy required to break a chemical bond and form neutral isolated atoms
7. The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree celcius
9. A tendency to maintain a balanced or constant internal state; the regulation of any aspect of body chemistry, such as blood glucose, around a particular level
10. An attraction between molecules of different substances
11. Formed when one or more electrons are transferred from one atom to another
13. A fat that is solid at room temperature and found in animal fats, lards, and dairy products
16. describes a molecule in which the positive and negative charges are separated
18. A liquid substance capable of dissolving other substances