IB BIO SL Unit 1

Ib Bio reveiw for IB exam mama #bossin

What are the 3 points of Cell Theory

• Living organisms are composed of cells

• The cell is the smallest unit of life

• Cells can only arise from pre-existing cells (through cell division)

What are the 7 necessary functions of life

1) Metabolism

2) Reproduction

3) Sensitivity

4) Homeostasis

5) Excretion

6) Nutrition

7) Growth

What is an emergent property?

A function that is present in multicellular organisms but not present in individual cells. It is a characteristic that arises when different parts of a system interact to create new functions

What is a stem cell?

Unspecialised cells with both self renewal—they can continuously divide and replicate—and potency—have the capacity to differentiate.

What is the relationship between surface area and volume?

When volume is divided by surface area, this is the ratio between the two variables (sa and v). The higher the rate of the diffusion in the cell, the greater the ratio.

Magnification Formula?

magnified size

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actual size

What is a Eukaryote?

A cell that contains a nucleus

What is a prokaryote?

single celled organisms that have a simple cell structure without compartmentalisation (membrane bound organelles)