Biology quiz pages 1-7

Genetic Code

DNA contains genetic code (for making proteins)

Cells

The smallest unit of life.

Unicellular

Having one cell

Multicellular

Having multiple cells

Homeostasis

Mantaining a stable internal enviroment

Reproduce

The production of offspring

Secsual Reproduction (It got censored)

Reproduction involving 2 cells

Asexual Reproduction

Reproduction involving one cell

Respond to the Environment

An organism responds to a stimuli

Grow

An Increase in matter

Develop

A change in a lifetime.

Evolve/ Evolution

Organisms change over time to survive

Qualitative

Research that involves more open-ended questions, descriptions, etc.

Quantitative

Research that involves specific data, collects numerical values.

Data

Information gathered from observations

Table

Organized Data

Graph

Visual representation of data

Variable

A factor in an experiment that can be changed

Independent Variabl

The experimenter controls this variable

“Manipulated Variable”

Input

X-axis

Dependent Variable

This variable is measured after the experiment

“Measured Variable”

Output

Y-axis

Controlled Variable

Factors that are purposefully kept the same

Experimental Group

The group with special treatment

Control Group

The group with NO special treatment

Observation

A use of any of the 5 sense to gather information.

Inference

A logical conclusion made based on prior knowledge

Hypothesis

A possible explanation for an observation

What are the five parts of a graph?

The Title

The Independent Variable

The Dependent Variable

The Scales

The Legend

Microscopes

An instrument that produces an enlarged image of an object

Magnification

The increase in an objects APPARENT size.

Resolution

The power of a microscope to clearly show detail.

List anything you know about Compound Light Microscopes

CLM

Specimens are thinly sliced and sometimes stained

The slide is placed on the stage and light shines through the specimen

Objective lenses enlarge the image of a specimen at different levels

This microscope maxes out at 400X

The magnified image is projected through the body tube to the eye piece where it is magnified to the total magnification

Total Magnification = Ocular Lens * Objective Lens

List everything you know about Electron Microscopes

Can NOT be used to view living specimen

Used to view extremely small objects

The beam of electrons produces an enlarged image.

Electron microscopes are more powerful than CLM’s

Scanning Electron Microscopes

Produces 3D images

Specimens are sprayed with a fine metal coating

Showered electrons are projected on a screen

Magnifies up to 100,000X

Transmission Electron Microscope

Magnifies up to 200,000 times

Projects images on a screen OR a photographic plate

Used to produce great images of internal details