Which of the Following Statements Is True

question 17

Multiple Choice

Which of the following statements is true?

• A) To obtain the total magnification, multiply the power of the objective lens by the power of the condenser.
• B) When observing a densely stained slide on oil, move the condenser all the way down and close the iris diaphragm.
• C) To obtain maximum magnification, immersion oil is added when using the 45´ objective.
• D) You should focus a specimen under the 100´ objective with only the fine-focus adjustment knob.

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Definitions:

Scavengers

Organisms that feed on dead or decaying organic matter, playing an important role in the ecosystem by helping to dispose of waste and recycle nutrients.

Radial Symmetry

A symmetry in which body parts are arranged around a central axis, so that any vertical cut through the axis results in identical halves, common in many invertebrates.

Nutrient Uptake

The process by which organisms obtain nutrients from their environment, essential for growth and maintenance.

Hemichordates

A phylum of sedentary, wormlike deuterostomes.