Biology

What is absolute zero and what does it mean in terms of diffusion?

-273 molecules stop

Explain how to make a wet mount

2 drops of water and slowly drop the cover slip on the live sample

The outer covering of a plant cell is made of a carbohydrate called?

Cellulose

Structures found in animal cells that give the cells help distribute chromosomes during cell division are the?

Centrioles

Name 2 structures present in plants cells that are not present in animal cells?

Chloroplast and cell wall

The cellular structure that converts solar energy into chemical energy in a plant cell are?

Chloroplasts

A structure in the cytoplasm of cells that acts as a repackaging center for proteins to be shipped out as a cell is the?

Golgi

All the small structures within the cells are what?

Organelles

The movement of water only, through a membrane from high to low concentration.

Osmosis

The outer covering of a plant cell gives the cell?

Structure and support

When using the microscope you always begin with what power?

40x scanning lens

Which has no nucleus: bacteria, plant, animal?

Bacteria

The portion of the microscope that keeps the 2 sets of lenses the proper distance apart and keeps out stray light is called?

Body tube

The outer most covering of an animal cell is?

Cell membrane

The outer most covering of a plant cell is?

Cell wall

What are the string like structures of DNA found in the nucleus?

Chromosomes

What is a concentration gradient?

Concentrations of substances that are not equal

What are the functions of chromosomes?

Contains hereditary information

The amount of light that enters the lenses of the microscope is controlled by the?

Diaphragm

The movement of molecules of any liquid or gas from high concentration to low concentration.

Diffusion

A membrane system of canal like areas within the cell that transports chemicals about the cell is called the?

Endoplasmic reticulum

Which cell type has a nucleus?

Eukaryote

What is he white circle of light called when you look through the microscope?

Field of view

When focusing the microscope on high power which focusing knob should be used?

Fine adjustment knob, so the stage can't crash into the sample

How should a microscope be carried?

Holding the arm and a hand underneath

When cleaning the lenses of the microscope what do you use?

Lens paper

What criteria are used to determine if something is living or not?

Made of cells Reproduce Genetic code Grow Obtain and use energy Respond to their environment Maintain a stable internal environment Evolve or change over time

What is the function of the nucleolus?

Makes ribosomes

Structures found in animal cells that give shape and structures to the cell are called?

Microtubules

The structure within the cell that releases energy for the cell is?

Mitochondria

Cell membranes are selectively permeable, what does this mean?

Only allows certain substances

Which cell has a nucleus: bacteria, plants, animals?

Plants and animals

Which cell type has no nucleus?

Prokaryote

What causes osmosis and diffusion to occur?

Random motion, bumping into each other

The outer most covering of a bacteria cell is?

Slime layer

What is meant by home position of the microscope?

Stage high, arm straight, 40x

Nucleus

The central structure of a cell is easily seen with a light microscope. This central structure controls all cellular activities.

Cytoplasm

The liquid portion of a cell.

Cell Membrane

The outer covering of all cells controls what goes in and out of the cell.

Nucleolus

Within this central structure of the cells are found one or more small dark dense structures.