Topic 1.1 - Cell theory Flashcards
Give three characteristics of cells
They are the smallest unit of life
They make up all living things
All cells are made up of other cells
What contains genes in both animal and plant cells ?
They are usually contained in the nucleus
Give exceptions to the cell theory
Skeletal muscle
Giant Algae
Aseptate fungi
What are the functions of life ?
Metabolism
Reproduction
Sensitivity
Homeostasis
Excretion
Nutrition
Growth
What is the ratio important to the limitation of the cell size ?
The surface volume ratio
When the metabolic rate is high, the material exchange rate is…
Low - survival changes are low
When the metabolic rate is low, the material exchange rate is…
High - survival chances are high
Give the two magnification calculation methods
MIA (Magnification = Image size / Actual size)
AIM (Actual size = Image size / Actual size)
Give two properties of the light microscope
Can view living specimens in natural colour
Has lower magnification and resolution
Give three properties of the electron microscope
Can only view dead specimens in monochrome
Has higher magnification and resolution
Can show cross-sections (TEM) or surface renderings (SEM)
Cells may be grouped together to form…
Tissues
Tissues may interact to form…
Functional organs
Functional organs may associate to form…
Body systems
Are emergent properties present in multicellular or unicellular organisms ?
They are present in multicellular organisms
