Biology

Mrs grend

Respiration - using oxygen and carbs to make energy

Sensitivity to stimulu - response to surrounding environment (plant moving toward sun)

Movement - self-powered movement

Growth - increase in size

Reproduce - be able to produce offspring and pass on genetics

Excretion - eliminating waste

Nutrition - intake of food

DNA - have genetic material

Living organisms can only exist where:

Chemical building blocks - carbon, oxygen, hydrogen, nitrogen

cellular repair growth & reproduction

Stable environment conditions - in a range of tolerance such as pressure, pH, temperature etc

Water - for biochemical reactions

Energy - source of energy

Eukaryotes

Tenets of cell theory

All living organisms are composed of cells

Cells are the basic unit of structure of organisms

All cells come from pre-existing cells

Prokaryotes

Have no membrane bound organelles

membrane-bound organelles

Larger cell sizes - plant cells however are larger than animal

Smaller cell sizes

Nucleus - made of DNA, holds genetic material, controls gene expression
nucleus has nuclear envelope
nucleolus - made of RNA, produces it, no membrane enclosed

Endoplasmic reticulum

Centriole

Lysosome

Peroxisome

Golgi apparatus

Mitochondria

Ribosomes (all cells have)

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Capsule - polysaccharide layer protection

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