Organisms and life processes 1

What a makes a thing alive?

doing MRS GRECN

MRS GRECN

Movement, reproduce, sensitivity, Growth and development, respiration, excretion, control, nutrients

What is sensitivity in MRS GRECN

sensitive to a change in their surroundings

What is respiration in MRS GRECN

release energy from their food

Examples of excretion

CO2, urea

what is control in MRS GRECN

controlling their internal conditions

Autotrophs

organisms that do photosynthesis

heterotrophs

organisms that consume others

What are living things made of

cells

Examples of unicellular bacteria

Streptococcus

Examples of protist unicellular organism

Amoeba

Examples of unicellular algae

Chlorella

Organelles in animal cells

cytoplasm, mitochondria, nucleus, cell membrane, ribosomes

Organelles only in plant cells

cell wall, chloroplasts, vacuole

what are membranes called in cytoplasms

endoplasmic reticulum

Cytoplasm

Contains H20 and site of chemical reactions

Nucleus

contains genetic material DNA and RNA

How do genes control activities of a cell

by determining which protein a cell can make

How does the cell know which proteins to make

DNA in contained in the nucleus and the instruction in making their proteins are carried to the cytoplasm and then to the ribosomes

Cell membrane

permaeble membran that controls what goes in or out of a cell

Mitochondria

carries out aerobic respiration using ATP energy

Cell wall

made of cellulose and helps maintain a fixed shape

Vacuole

a cell sap that contain sugar and minerals

Chloroplasts

convert light energy to chemical energy

Metabolism

anabolic and catabolic reactions taking place in a cell

Enzymes work by

decrease activation energy