Correct Answer: A. lung

Explanation

Bronchioles are small, narrow tubes that are part of the respiratory system and are found within the lungs. After the air passes through the trachea and bronchi, it enters the bronchioles, which represent the smaller airways within the lungs.

Correct Answer: D) number of chromosomeres they contain

Explanation

Body cells and gamete cells are two types of cells found in our bodies. Body cells or somatic cells are diploid cells that contain two sets of chromosomes, while gamete cells are haploid cells that contain only one set of chromosomes. The question is asking how body cells differ from gamete cells. The answer to the question is option D, number of chromosomeres they contain. Body cells contain twice the number of chromosomes as gamete cells. For example, in humans, body cells contain 46 chromosomes, while gamete cells contain 23 chromosomes. The other options are incorrect. Option A, type of centromeres they contain, is incorrect because both body cells and gamete cells contain centromeres. Option B, number of chromosome pairs they contain, is incorrect because both body cells and gamete cells contain a specific number of chromosome pairs. Option C, type of chromatide they contain, is incorrect because both body cells and gamete cells contain chromatids. It is important to understand the difference between body cells and gamete cells because it plays a fundamental role in reproductive biology. Gamete cells are involved in sexual reproduction, while body cells are involved in growth and development. To learn more about this, please read the relevant sections of the recommended textbooks.

Correct Answer: C. give loan to business men

Correct Answer: D. allows current to flow only in one direction

Explanation

The primary function of a semiconductor diode that makes it suitable for rectifying alternating current (AC) into direct current (DC) is its unidirectional conduction property.

Let's break down why:

• Alternating Current (AC): Current periodically reverses its direction of flow.

• Direct Current (DC): Current flows in only one direction.

• Rectification: The process of converting AC to DC.

A semiconductor diode works like a one-way valve for current:

• It allows current to flow easily when it is forward biased (positive voltage on the p-side, negative on the n-side).

• It blocks current (or allows only a very small leakage current) when it is reverse biased (negative voltage on the p-side, positive on the n-side).

By placing a diode in an AC circuit, it only allows the half-cycles of the AC voltage that correspond to forward bias to pass through, effectively cutting off the other half-cycles. This results in current flowing only in one direction, thus converting AC to pulsating DC.

Now let's evaluate the options:

• A. allows current to flow in either direction: This is incorrect. If it allowed current to flow in either direction, it would pass AC unchanged and wouldn't rectify it.

• B. is non-linear: While a diode is indeed a non-linear device (its current-voltage relationship is not a straight line), its non-linearity is a characteristic that enables its one-way conduction, but the direct reason for rectification is the one-way conduction itself, not just non-linearity in general.

• C. offers a high input resistance: A diode offers high resistance when reverse biased and low resistance when forward biased. This variable resistance is what causes the one-way flow, but simply stating high input resistance doesn't capture the essence of its rectifying action.

• D. allows current to flow only in one direction: This precisely describes the property of a diode that enables it to convert AC (which flows in two directions) into DC (which flows in one direction).

The final answer is D

Correct Answer: A. quantum numbers of electrons

Correct Answer: C. Tropical humid

Correct Answer: C. Thick elastic walls

Correct Answer: A. consumer satisfaction

Correct Answer: D) Accounts receivable

Correct Answer: C. Highland areas