IB Bio HL Unit 1

Reproduction (Processes of Life)

Living things all produce offspring. Reproduction can be sexual or asexual.

Nutrition (Processes of Life)

Living things must obtain energy and nutrients from their environment

Homeostasis (Processes of Life)

Living things maintain constant internal condition despite changes to their external environment.

Movement (Processes of Life)

Living things have some control over their place and position in their environment.

Responds to Stimuli (Processes of Life)

Living things respond to changes in their external environment

Excretion (Processes of Life)

Living things must facilitate the removal of their own METABOLIC (from chemical reactions) waste products.

Metabolism (Processes of Life)

Living things have chemical reactions that take place in their cells

Growth (Processes of Life)

Cells can increase in size over a period of time. In multicellular organisms, growth can also refer to an increase in the number of cells in an organism

All cells have (1)

Cell membrane

All cells have (2)

Cytoplasm

All cells have (3)

Ribosomes (make proteins)

All cells have (4)

Genetic information (DNA)

Cell Theory (1)

All living things are made of one or more cells

Cell Theory (2)

Cells are the basic unit of life

Cell Theory (3)

Cells come from preexisting cells

Implication of Cell Theory

Unicellular organisms must be able to perform all 8 processes of life within their single cell

Implications of Cell Theory - Viruses

viruses are not cells, they are not alive