Living Things & Microscopes

Science 10

5 characteristics of life

-Energy
-Waste
-Environment (Adaptation)
-Reproduce
-Grow

Basic unit of a system:

cells

Major organs are made from:

tissues

What are animalcules

microscopic organisms

compound light microscope can be magnified up to:

2000x and has two lenses

How do electron microscopes work?

beams of electrons to form an image by bouncing off of it

how to calculate field of view for medium power?

low power field of view x low power magnification ÷ medium power magnification

how to calculate field of view for high power?

medium power field of view x low power magnification ÷ high power magnification

What are the magnification on each level?

4

How many micrometers are in a millimeter?

1000

Name one single cell that is very easy to see

egg

What cells don't have a nucleus?

prokaryote: red blood cells

how many pairs of chromosomes do humans have

23

Why are red blood cells red?

protein chemical called hemoglobin which contains iron and it mixes with oxygen

The nucleus contains what?

chromosomes and genes are made of DNA

how many different types of cells do humans have?

200

what are two disadvantages of unicellular organisms?

-cant grow very large
-only live in water

what are five advantages of multicellular organisms?

-live in variety of environments
-can grow very large
-obtain energy from variety of foods
-complex bodies
-specialized cells work more efficiently than others

systems work together to form

organisms

function of nerve tissue

transmit information throughout the body

function of muscle tissue

movement

function of epithelial tissue

protection

function of epidermal tissue

covers the plant

function of connective tissue

bind

function of root system

anchorage

function of shoot system

photosynthesis

function of reproductive system

flowers