Botany Lab Flashcards
(103 cards)
Importance of Plant to Human and animals
- Food
- Fiber
- Fuel
- Medicine
Microscope is invented by:
Gallleo Galloi
Zaccharias Jansen & Hans Lipperhey
Microscope is invented by:
Gallleo Galloi
Zaccharias Jansen & Hans Lipperhey
Uses of micrascope
Botanical Field
Biological Field
Crime Investigation
Educational Field
Medical Field
Types of microscope.
Simple Microscope
2 fight microscope a Compound
b. Desecting (stereomicroscop
3 electron microscope
Transtion Electron Microscope
Scanning Electron Microscope
Scanning Tunneling Microscopi
The chromosome are at the poles, and are becoming more diffuse. The nuclear envelope reforming
The
Telophase
The chromatids of each chromosome have separated and are moving toward the poles.
Anaphase
The chromatids of each chromosome have separated and are moving toward the poles.
Anaphase
Thick colled chromosomes, each with two chromatids, are lined up on the metaphase plate.
Metaphase
an instrument that can magnify images of cells and tissues up to hundreds or even thousand times of their actual size.
Microscope
First perfected the device known as microscope
Galileo Galileo
first men to develop the concept of compound microscope
Zaccharias Janssen & Hans Lipperhey –
– require most material being examined to be sliced thinly enough for the light to pass through.
a. Compound
allow three dimensional viewing of opaque objects.
b. Dissecting (stereomicroscope) –
detailed images of tiny structures within the cell)
- electron microscope
can magnify up to 200, 000 and more.
Transition Electron Microscope -
urface detail of thick objects can be observe when the scanner makes the object visible on a cathode tube like a TV screen.
Scanning Electron Microscope – s
uses minute probe that tunnels electrons upon a sample.
Scanning Tunneling Microscope –
uses minute probe that tunnels electrons upon a sample.
Scanning Tunneling Microscope –
1.Separates the objective and the eyepiece and assures continuous alignment of the optics.
Body tube
2.Holds the objective lenses
3
Revolving nosepiece
- Magnifies 10x and is useful for examining large specimens or surveying many smaller specimens
Low power objective lens
4.Shortest objective and is useful for getting a general overview of a slide.
Scanning objective lens
Magnifies 40x and is ideal for observing very fine detail.
High-power objective lens