Explanation

Evaluation involves collecting various types of data (like attendance, questionnaires, teacher ratings) to make judgments about student performance.

It is broader than testing or measurement, combining both quantitative and qualitative information.

Explanation

At temperatures above the optimum, enzymes lose their three-dimensional shape — a process called denaturation.

Denatured enzymes cannot bind substrates properly, leading to a rapid drop in reaction rate.

Explanation

Diatoms are microscopic algae and a major component of phytoplankton in aquatic ecosystems.

They play a key role in oxygen production and the marine food chain.

Explanation

A hypothesis is a testable, tentative explanation for a biological problem, based on initial observations.

It guides experiments and is later validated or refuted.

Explanation

Intelligence tests assess higher-order thinking skills, including problem-solving, analysis, and adaptability.

They go beyond rote knowledge (unlike achievement tests) to measure cognitive abilities.

Explanation

In the sentence, 'light' describes the noun 'affair', showing it's not serious—hence, it's an adjective.

Adjectives modify nouns to give more information about their quality or nature.

Explanation

Detritus food chain starts with dead organic matter (detritus), including decaying plant material.

Decomposers (like fungi, bacteria) and detritivores (like earthworms) feed on this material, converting it into simpler substances.

Explanation

In this reaction, element C displaces B from compound AB, forming A + BC.

Such reactions are classified as single displacement or single replacement reactions.

Explanation

Lactobacillus bulgaricus is a lactic acid bacterium used primarily in the fermentation of milk to produce yogurt.

It works alongside Streptococcus thermophilus to convert lactose into lactic acid, giving yogurt its texture and tangy flavor.

Explanation

Loudness is how the intensity of a sound is perceived by the human ear.

Greater intensity → louder sound.

It is measured in decibels (dB).