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Biology 120 Lab > Lab #2 > Flashcards

Lab #2 Flashcards

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1
Q

Microscopes all have

A

Lens system, adjustable light source, and focusing mechanism

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2
Q

The base of a compound microscope contains

A

Light switch, light source, and voltage adjustment controls

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3
Q

What does the condenser do?

A

Focuses the light on the specimens on the slide supported on the microscope stage

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4
Q

An iris diaphragm allows

A

To regulate light intensity

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5
Q

Glass slide is where

A

The specimen is mounted

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6
Q

Stage clips help

A

Hold slide in place

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7
Q

Mechanical stage control allows you to

A

Move the mechanical stage

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8
Q

Light pass through the

A

Objective lens and passes through the ocular lens

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9
Q

Monocular

A

One ocular lens

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10
Q

Binocular

A

Two ocular lenses

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11
Q

Coarse focusing knob

A

Rough focus

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12
Q

Fine-focusing knob

A

Sharp focus

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13
Q

Compound microscope is used to..

A

Observe microscopic objects

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14
Q

Magnification

A

Indicates the number of times the image of the sample is enlarged by the microscope

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15
Q

Ocular lens have a magnification power of

A

10x

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16
Q

Resolution is

A

The ability to clearly distinguish objects which are close together by decreasing the wavelength of light used to increase resolution

17
Q

Specimen preparation

A

Mounting of sample on the microscope slide with a coverslip

18
Q

Prepared/permanent slides

A

Preserved living samples

19
Q

Wet mount/temporary slides

A

Aqueous solution covered with a cover glass

20
Q

Focusing

A

Rotating focus knobs to adjust distance

21
Q

Field of view

A

Diameter of visible image

22
Q

Depth of field

A

Distance between highest and lowest points in the sample that are simultaneously in focus

23
Q

Working distance

A

Distance between objective and specimen

24
Q

Light intensity, working distance, field of view, and depth of field ______ when magnification increases

A

Decrease

25
Q

Carry your microscope

A

Holding the arm and supporting the base

26
Q

As magnification increases…

A

Less of the superimposed planes remain in focus

27
Q

Magnification range for stereo microscope

A

8x-35x

28
Q

Genotype

A

Genetic makeup (alleles) is a organism

29
Q

Phenotype

A

Determined by genotypes and environment where the organism lives

30
Q

Gene

A

Heritable unit that influences a trait; sequence of DNA

31
Q

Alleles

A

Alternative DNA sequences at the same gene locus which may or bam may not result in phenotypic traits

32
Q

Locus

A

A site on a chromosome where a particular gene is located

33
Q

Homozygous

A

Identical genes (aa or AA)

34
Q

Heterozygous

A

Dominant and recessive traits

Biology 120 Lab (11 decks)

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