CELL

Cell is the basic unit of life, there are 2 types of cells:

Prokaryotic cell: are cells that lacks of nuclear membrane. They also have only a few of internal organelles. Cells of the monera kingdom as bacteria are prokariotic.

Eukaryotic cell: This cells have a real nucleus, many organelles like mitochondria, endoplasmatic reticulus and if it is a plant cell chloroplasts.

SCIENTIFIC METHOD

Biology use the scientific method to study all the living things.




The scientific method is a way to ask and answer sceintific questions by making observations and doing experiments.



STEPS OF THE SCIENTIFIC METHOD

1. IDENTIFY A PROBLEM: Is the question that you want to answer. For example: Why do spiders make nets? or Why do dogs and cats have hair?



2. MAKING OBSERVATIONS: By looking up for information either in books or journals, or looking the bahaviour of the problem you want to resolve helps to have data ans begin to resolve the question.



3. STATE HYPOTHESIS: A hypothesis is a likely explanation of the problem. It is a posible answer to the question. That hypothesis must be tested.



4. TEST HYPOTHESIS: Experiments are used to test the hypothesis. It has variables and a control test.



5. COLLECT DATA: Data are pieces of information from a experiment.



6. STUDY DATA: Decide what the information means. This data must always offer evidence to support the statements.



7. MAKE CONCLUSIONS: Decide if your data support your hypothesis.

BIOLOGY "THE SCIENCE OF LIFE"

Biology comes from the greek word /bios/, that means life and /logos/ study or knowledge, so is the science of life and living organisms.

An organisms is a linving identity consist of one cell, as bacterias or several cells like animals and plants.

Biology studies the structure, fuction, growth, origin, evolution and distribution of living things. Depending on what it is studied the biological science are classified in:

• BOTANY: study of plants
• ZOOLOGY: study of animals
• MICROBIOLOGY: studies microorganisms
• BIOCHEMISTRY: Studies the chemistry of life
• MOLECULAR BIOLOGY: studies complex interaction of biology molecules
• CELLULAR BIOLOGY: studies the basic buliding blocks of life cells
• ECOLOGY: examines how various organisms interact.