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43 terms

Biology Neblett Chapter one "Quest (test/quiz)"

Biology Neblett Chapter one "Quest (test/quiz)"
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Cells
smallest units of living things that are themselves alive- can be unicellular or multicellular
2 types of reproduction
sexul and Asexual
Sexual reproduction
2 different cells unite and the offspring looks like a little of both
Asexual
a new organism is formed from a singe parent
Unicellular organisms grow and develop how?
grow in size
Multicellular organisms grow and develop how?
grow in size and shape, initial cell replicates and eventually differentiates
Energy
what everything needs to maintain life and grow
metabolisom
the break down or build up of materials to carry out life process
The sun
is the ultimate source of energy for everything
Stimulus
signal that brings response, internal and external (shivering when cold, sweating when hot)
Homeostasis
The process of keeping internal conditions the same
the 2 types of Evolution
Macro and Micro
Micro Evolution
Grow as a population, each generation differs
The genetic code
DNA (deoxyribonucleic acid)
Bioshpere
The part of the earth that contains all ecosystems
Ecosystems
A community and its nonliving surroundings
Community
Populations that live together in a defined area
Population
A group of organisms of one type that live in the same area
Organism
An individual living thing
Group of Cells
Tissues, organs, and organ systems
Molecules
Groups of atoms; smallest unit of most chemical compounds
What does a Microscope do?
It produces magnified images of structures that are to small for the human eye to see.
What are the 2 types of microscopes?
Light Microscope (compound), Electron Microscope
What does a Light Microscope use?
Light
What does a Electron Microscope use?
Electrons
What is the most a Light Microscope can magnify?
100x
Light Microscopes can not produce a clear image of things up to?
0.2 micrometer
What is the most a Electron Microscope can magnify?
1000x
What is more detailed than a light microscope?
Electron Microscope
What are the 2 types of Electron Microscopes?
Transmission Electron Microscope, Scanning Electron Microscope
Transmission Electron Microscope
Beams electrons through the specimen and produces a flat image
Scanning Electron Microscope
Beams electrons back and forth across the surface, and creates a 3D image
Eyepiece
Contains a magnifying lens
Arm
Supports the body tube
Stage
Supports the slide being observed
Fine adjustment knob
Moves the body tube slightly to sharpen the image
Coarse adjustment knob
Moves the body tube to sharpen the image
Base
supports the microscope
Illuminator
Produces light or reflects light up two toward the eyepiece
Stage Clips
hold the slide in place
Low-Power Objective
Provides a magnification of 10x and is the shortest objective
High-Power Objective
Provides a magnification of 40x and is the longest objective
Nose piece
Holds the objectives and can be rotated to change the magnification