Cells are composed of atoms, elements, compounds (organic and inorganic) and macromolecules. Proteins, carbohydrates, lipids and nucleic acids are found inside the cell.
A cell is - the smallest unit of matter that can carry on all life processes
- the smallest unit of life that exhibits the characteristics of life
Discovery of the cell was made possible by the development of the
The study of the cell is known as
Hooke (1660's)
Leeuwenhoek (1670's)
THE CELL THEORY (1800'S) - SCHLEIDEN, SCHWANN AND VIRCHOW

You have 2 plants of the same type and same size, same amount of leaves. one of them is put inside the house and the other one is put in the balcony. you water them saturday, one plant with 200 ml and the other with 400 ml of water. which one of your plants need less water? explain.

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.