Organic molecules, membranes etc

Question 1

Organic molecules

Answer 1

The first stage of the evolution of life was the creation of organic molecules, either through synthesis from inorganic molecules, or from
outer space

these organic molecules began to clump together in a “soup”

Question 2

membranes

Answer 2

A membrane had to be developed to protect the internal environment of
the large organic molecule

The internal environment, i.e. the contents began to evolve into nucleic acids and the primitive cell could now replicate

RNA was thought to be the first genetic material

Question 3

Procaryotic heterotrophic cells

Answer 3

The first and simplest types of cells, like bacteria

No membrane-bound nucleus or membrane-bound organelles

These consumed other organic molecules to provide energy (heterotrophic)

Question 4

􏰁 Prokaryotic autotrophic cells

Answer 4

Some of the heterotrophic procaryotic cells developed pigments

These pigments allowed them to use the energy from the sun to create food

Question 5

􏰁 Eucaryotic cells

Answer 5

These cells had membrane-bound nuclei and organelles

Examples include animals, fungi, plants

Question 6

Colonial organisms

Answer 6

Colonial organisms are groups or colonies of similar cells, eg,
stromatolites

All the cells in the colony have the same function; no differentiation

They form when daughter cells from cell division become bound together

Question 7

Multicellular organism

Answer 7

These are groups of cells, where some cells have differing functions from
others

Each cell has its own specialised function and all cells depend on each
other

The organism functions as a coordinated whole