(Q).
Q: What type of polarization does a negative object create> Read this paragraph and choose the correct option from the provided answers: Figure 18.15 Both positive and negative objects attract a neutral object by polarizing its molecules. (a) A positive object brought near a neutral insulator polarizes its molecules. There is a slight shift in the distribution of the electrons orbiting the molecule, with unlike charges being brought nearer and like charges moved away. Since the electrostatic force decreases with distance, there is a net attraction. (b) A negative object produces the opposite polarization, but again attracts the neutral object. (c) The same effect occurs for a conductor; since the unlike charges are closer, there is a net attraction. Choices: - common polarization - simple polarization - negative polarization - opposite polarization A:
(A).
opposite polarization

(Q).
Q: What types of genes encode transcription factors? Read this paragraph and choose the correct option from the provided answers: Homeobox genes are involved in the regulation of genes important to development. They encode transcription factors. Choices: - glycosyl transferases - isozyme genes - rohail genes - homeobox genes A:
(A).
homeobox genes

(Q).
Q: What instrument, with a digital readout, is used by scientists to measure very small masses? Read this paragraph and choose the correct option from the provided answers: To measure very small masses, scientists use electronic balances, like the one in the Figure below . This type of balance also makes it easier to make accurate measurements because mass is shown as a digital readout. In the picture, the balance is being used to measure the mass of a white powder on a plastic weighing tray. The mass of the tray alone would have to be measured first and then subtracted from the mass of the tray and powder together. The difference between the two masses is the mass of the powder alone. Choices: - mixed balance - mechanical balance - common balance - electronic balance A:
(A).
electronic balance