MULTIPLE CHOICE. CHOOSE THE BEST ANSWER TO EACH QUESTION 1) Antanie van and repo

Question

MULTIPLE CHOICE. CHOOSE THE BEST ANSWER TO EACH QUESTION 1) Antanie van and report the nef: 53-64 skin 2) Total Magnification combines the magnifying power of te A) Ol immersion Lens a 8) Low Power Lens and High Power Lens C) Objective Lens and Ocular Lens D) Two ocular lenses in the eye piece Type: Mc Pago Ref: 55-66 Skill: Demonstrate Understanding 3) Which of these units is Metrie system? A) Miles B) Ounces C) Gallons DCelsius Type: MC Page Ref: 52-55 Topic: measurements Skill: Demonstrate Understanding 4) Choose the pair of Microscopes that use stains to contrast the image against the background A) Brightfield & Fluorescence B) Darkfield & Differential Interference Contrast C) Phase Contrast & Darkfield D) Fluorescence & Phase Contrast Type: MC Page Ref: 57-65 Topic: microscope types Skill: Requires Recollection 5) Wavelength that is shorter than 390 nanometers is A) Visible B) Micro-Wave C) Ultra-Violet D) Infra-Red Type: MC Page Ref: 55-66 Topic: measurements Skill: Demonstrate Understanding

Explanation / Answer

1. Antonie von Leeuwenhoek is the man who observed the bacteria for the first time.

Robert Hook discovered the cells for the first time. But they are not the bacterial cells.

Hence option "B" is the correct answer.

2. Total magnification of a microscope combines the magnifying power of objective lens and ocular lens. Objective lens is the lens which is near to the object that has to be observed. ocular lens is the one which is near to the eyes of the observer.

the total magnification of any microscope is the combined magnification of the ocular lens and objective lens.

Hence option "C" is the correct answer.

3. The units in metric system are kilo for mass, liter for volume, meter for length etc. In the metric system "Celsius" is the unit of measurment for temperature.

miles, ounces and gallons are used to measure length, mass and volume only, But these are not the units of metric system.

Hence option "D" is the correct answer.

4. differential interference microscopy and dark field microscopy do not use stains. hence option "B" is the correct answer.

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