Organisms, Scale, and Microscopic Life
A living thing, such as a plant, animal, or bacterium
organism
The basic unit of life
Cell
the cell’s “command center”
nucleus
1 micrometer (µm) was represented by __________________ centimeters.
2
human body contains roughly how many microorganisms
100 Trillion
the relative size of things
scale
cells are made of
molecules
stores water in the cell and is much larger in plant cells than in animal cells
vacuole
microorganisms are magnified 20,000 times, they can be large enough to fit here
palm of your hand
Molecules are ___________________ than cells.
smaller
too small to be seen with the naked eye
microscopic
observed tiny organisms moving around, helping show that microscopic life was living
Anton van Leeuwenhoek
allows plant cells to use sunlight to make food
chloroplast
provides food and vitamins for microorganisms
agar
plant cell have additional layers
Cell wall
a microscopic cell multiplies into a colony of millions of cells, the colony may become visible to this
used a microscope to look at cork and named the tiny, hollow structures “cells.”
Robert Hooke
the outer layer of all cells
cell membrane
group of microorganisms growing together
colony
cell theory idea is that living things are made one or many
cells
equal to one-thousandth of a micrometer
nanometer
A group of the same type of cells working together to perform a specific function
tissue
releases energy from glucose and oxygen.
mitochondria
When growing healthy bacteria from yogurt, is it preferable to have more or less growth after three days
more
human body contains a large community of microorganisms
The human microbiome