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Biology Lab > Midterm > Flashcards

Midterm Flashcards

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AP® Biology flashcards Biology 101 flashcards
0
Q

What is an independent variable ?

A

Variable being manipulated

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1
Q

What is the definition of a control

A

The object or thing that is not manipulated

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2
Q

What is a dependent variable ?

A

Measured outcome of the manipulation

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3
Q

What are ectotherms?

A

The body temperature depends on the environmental temperature.

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4
Q

What are endotherms?

A

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

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5
Q

Examples of extotherms?

A

Fish,amphibians, reptiles

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6
Q

Examples of endoterms

A

Humans

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7
Q

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

A
  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.
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8
Q
  1. Proper steps you should take when focusing a compound microscope .
A
  1. Hold the arm of the scope and the base of the scope.
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9
Q

Proper steps 2

A

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

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10
Q

Proper step 3

A

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

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11
Q

Proper steps 4

A

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

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12
Q

Proper steps 5

A

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

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13
Q

Proper steps 6

A

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

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14
Q

Proper steps 7

A

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

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15
Q

Proper steps 8

A
  1. When you have finished reviewing the slide, return the nosepiece I the low power objective before removing the slide from the stage.
16
Q

Resolving power

A

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

17
Q

What is field of vision?

A

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

18
Q

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

A

Depth of field

19
Q

Calculate total mag

A

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

20
Q

3 categories of macromolecules

A

Proteins: amino acids
Polysaccharides: monosaccharides
Nucleic acids : nucleotides

21
Q

What are amino acids?

A

Monomers that make up proteins

22
Q

What are proteins?

A

He most diverse group of macromolecules

23
Q

What is starch and glycogen?

A

Energy storages that are polymers

24
Q

What category of organic molecules are fats and oils included?

A

Lipids

25
Q

What is glucose

A

Important energy molecule in all types of cells

26
Q

All cells come from pre-existing cells

A

Cell theory

27
Q

2 basic types of cells

A

Prokaryotic and eukaryotic

28
Q

Histology

A

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

29
Q

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

A

Brownian Motion

30
Q

A difference in the concentration of a substance between areas

A

Concentration Gradient

31
Q

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

A

Hypotonic

32
Q

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

A

Hypertonic

33
Q

Equal concentration inside and outside, no net movement

A

Isotonic

34
Q

The diffusion of water across a membrane

A

Osmosis

35
Q

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

A

Diffusion

36
Q

Small organ located in the cell

A

Organelle

Biology Lab (1 decks)

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