Cannot be gained or lost during a reaction, only transformed.

a. air
b. matter
c. electricity
d. reactants

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

10. in which phase will crossing-over occur? a. mitosis b. metaphase ii c. prophase i d. meiosis ii

Organelles found in plant cells that function through photosynthesis to produce glucose from carbon dioxide and water are called — question 21 options: chloroplasts guard cells photosynthons