Category: 4. Patwari (HP), JBT (HP)

In a simple starch test, iodine solution turns blue-black on a boiled leaf because it reacts with A Starch stored

A green leaf kept in sunlight uses carbon dioxide and water to prepare food mainly in which form A Glucose

A student observes microbes that survive very high heat in hot springs; these microbes are best described as A Desert

In a school lab, a student stains bacteria before viewing because staining mainly helps to A Reduce temperature B Add

When a student wants to compare shapes of bacteria safely, the correct tool to use is a A Telescope B

In basic biology, bacteria are usually classified as organisms that have A True nucleus B No nucleus C Many cells

Microorganisms are generally defined as living things that are A Seen by naked eye B Very large organisms C Only

After heavy rain, a field forms hard crust; which soil-preparation step prevents poor seedling emergence A Late harvesting only B

If soil is not loosened properly, which problem is most likely during early crop growth A Extra seed formation B

While preparing land, why is soil tilled again after initial ploughing A To crush clods B To harden soil C