Life science 10 Unit 1

What does Water help with organisms

Helps organisms to carry out cellular activity

(DNA replication, cell division, protein synthesis, breaking down or transporting food

Nutrients

Provide organisms with what they need to grow

Autotrophs

Producers: ex. Plants and some bacteria

Heterotrophs

Consumers: ex.

• Carnivores: eats animals

• Herbivores: eats plants

• Omnivores: eats animals and plants

What is stimulus

Any activity that brings a repsonse

Difference between internal and external stimulus

Internal: hunger, thirst, fatigue

External: light, sound (surroundings)

Cell differentiation

A PROCESS: Result of gene expression (gene is switched on or off) resulting in different proteins being made

Cell specialization

Multicellular organisms develop specialized cells in to perform certain functions

homeostasis

the ability to maintain internal condition in response to environmental changes

ex. hot temp. sweat to cool off/ cold temp. shiver

Prokaryotes

Simple unicellular organisms

no membrane bound organelles

all prokaryotes are bacteria

no nucleus

Eukaryotes

complex organisms (living things)

unicellular or multicellular

has organelles surrounded by membranes

Cellular Respiration

a process in which stored energy is broken down to release energy

occurs in mitochondria, in plant and animal cells

in: O2 + glucose out: CO2 + water

releases energy

photosynthesis

a chemical process in which green plants use sunlight to produce energy

occurs in chloroplast, in plant cells

in: CO2 + water out: O2 + glucose

stores energy