Midterm

Question 0

What is an independent variable ?

Answer 0

Variable being manipulated

Question 1

What is the definition of a control

Answer 1

The object or thing that is not manipulated

Question 2

What is a dependent variable ?

Answer 2

Measured outcome of the manipulation

Question 3

What are ectotherms?

Answer 3

The body temperature depends on the environmental temperature.

Question 4

What are endotherms?

Answer 4

Not dependent upon environmental temperature,use physiological means to maintain body temperature .

Question 5

Examples of extotherms?

Answer 5

Fish,amphibians, reptiles

Question 6

Examples of endoterms

Answer 6

Humans

Question 7

2 strategies may aquatic ectotherms use to adjust to a changing environment ?

Answer 7

1. In some ectotherms low temperature leads to lower metabolic rates; chemical reactions slow down, lowering the oxygen and nutritional requirements of the animal.
2. Others maintain active lifestyles in freezing weather by increasing their production of metabolic enzymes.

Question 8

1. Proper steps you should take when focusing a compound microscope .

Answer 8

1. Hold the arm of the scope and the base of the scope.

Question 9

Proper steps 2

Answer 9

2.Make sure scanning lens is in place . Always start and end a session with lens in place.

Question 10

Proper step 3

Answer 10

3.If necessary clean the ocular and objective lenses with lens paper

Question 11

Proper steps 4

Answer 11

4.Place a clean slide on the stage and with the stage clips

Question 12

Proper steps 5

Answer 12

5.Using the coarse adjustment knob, move the stage up until it stops .

Question 13

Proper steps 6

Answer 13

6.With both eyes open look into the oculars and use the coarse adjustment knob to move the stage down very slowly .

Question 14

Proper steps 7

Answer 14

7.Make the necessary observations at low power, and then carefully move the nosepiece to use the high powered objective.

Question 15

Proper steps 8

Answer 15

8. When you have finished reviewing the slide, return the nosepiece I the low power objective before removing the slide from the stage.

Question 16

Resolving power

Answer 16

The way microscopes allow us to see things that our eyes would not be able to see unaided

Question 17

What is field of vision?

Answer 17

The area that you see when you look into the eyepiece .

Question 18

The thickness of a specimen that can be viewed with one plane if focus

Answer 18

Depth of field

Question 19

Calculate total mag

Answer 19

10x |4x-40x
10x|10x-100x
10x|40x-400x

Question 20

3 categories of macromolecules

Answer 20

Proteins: amino acids
Polysaccharides: monosaccharides
Nucleic acids : nucleotides

Question 21

What are amino acids?

Answer 21

Monomers that make up proteins

Question 22

What are proteins?

Answer 22

He most diverse group of macromolecules

Question 23

What is starch and glycogen?

Answer 23

Energy storages that are polymers

Question 24

What category of organic molecules are fats and oils included?

Answer 24

Lipids

Question 25

What is glucose

Answer 25

Important energy molecule in all types of cells

Question 26

All cells come from pre-existing cells

Answer 26

Cell theory

Question 27

2 basic types of cells

Answer 27

Prokaryotic and eukaryotic

Question 28

Histology

Answer 28

Study of tissues; they group cells into four basic categories or tissue types

Question 29

The motion of molecules is due to their energy as molecular energy increases the rate of movement increases also

Answer 29

Brownian Motion

Question 30

A difference in the concentration of a substance between areas

Answer 30

Concentration Gradient

Question 31

Lower concentration gradient of solute outside if the cell. (Gain waters; swells)

Answer 31

Hypotonic

Question 32

Higher concentration of solute outside the cells. Water moves out; shrinks.

Answer 32

Hypertonic

Question 33

Equal concentration inside and outside, no net movement

Answer 33

Isotonic

Question 34

The diffusion of water across a membrane

Answer 34

Osmosis

Question 35

Movement of molecules from an area of high concentration to an area of low concentration

Answer 35

Diffusion

Question 36

Small organ located in the cell

Answer 36

Organelle