science test 2 Flashcards
What is spontaneous generation
living things that can be produced by non-living things.
what is biogenesis generation
Living things that can be produced by other living things.
what was Redi experiment?
He puts meat in a container and seals it tightly and then puts meat in a another contained and does not seal it. His hypothesis confirmed, that the maggotʻs only appeared in the non-sealed container.
what was Needham’s experiment?
He boiled broth and then split it into a container he left open and another one he sealed with a cork. Still, maggots appeared in both.
what was Spallanzin experiment?
he boiled meat broth for an hour and put some in an open container and the rest in a container he melted the glass on top so it was sealed tight. There were microorganisms present in only the one that was opened.
What was Pasteur experiment?
Pastuer made a container that tilted up, then down to let air in but not microorganisms. He put meat broth in that container and one that was open, and microorganisms only appeared in the open one. He proved spontaneous generation was not true once and for all.
name the 11 characteristics
- response
- energy use
- metabolism
- organic compound production
- growth
- devolvement
- reproduction
- inheritance
- adaptation
- composed of cells
- movement
Response (Stimulus and response)
Stimulus: change in environment that cause a response.
Response: Reaction to what you do.
Energy Use (autotroph and heterotroph)
Autotrophs: Can make their food.
Heterotroph: Canʻt make their food.
Metabolism
The sum of all chemical reactions of living things.
Organic compound production
Compounds make by living things, contains carbon.
Growth
getting larger over time.
Development
Getting more complex over time
Reproduction (Sexual and Asexual)
Sexual: Two cells needed (parents)
Asexual: One cell needed (Parent)
Inheritance
Passing of genetic traits from parent to offspring
Adaptation
Allows a organisms to survive
Composed of cells (Unicellular and Multicellular)
Unicellular: One cell
Multicellular: made of many cells
What is the difference between a simple and compound microscope?
The simple uses one lens and the compound uses two lens.
what is par-focal
The “switch” to stay focused for when you switch the objectives.
what is par-central
If one objective lens has the object in
focus, and you go to the next objective lens, only a minor adjustment is needed to bring the image back into focus.
what is a working distance
The ability to keep an object in the
middle of your field-of-view when changing from one objective to another.
How do you calculate the total magnification of a compound microscope?
multiply the magnification of the eyepiece by the magnification of the objective you are using.
How do you carry a mircoscope
grab the arm with one hand and put the oher hand under the base
Why should you not use the coarse adjustment knob when using high power objective?
Because the high power objective is already so close to the slide, that if you make big changes with the coarse adjustment knob, it might crash into the slide and break it.
