Explanation

• Marine water is water that contains a high amount of salt, typically above 30% salinity.
• This includes oceans, seas, and other saltwater bodies.

Explanation

• Secretin is a hormone that stimulates the release of digestive enzymes and bicarbonate from the pancreas.
• But it is not a tissue layer of the alimentary canal.

Explanation

In solids, heat transfer occurs primarily through conduction, where vibrations and collisions of particles (atoms or molecules) transfer energy from one point to another.

Explanation

• Convection is the mode of heat transfer that occurs when a fluid (such as a gas or liquid) moves and carries heat energy from one location to another.
• This transfer of heat occurs due to the bulk motion of the fluid.

Explanation

• Freshwater is water that contains a very low amount of salt, typically less than 1% salinity.
• Examples of freshwater sources include rivers, lakes, streams, and underground aquifers.

Explanation

• Filtration is a function of the kidneys, which filter waste and excess substances from the blood.
• It is not a digestive function.

Explanation

• Atoms that gain electrons become negatively charged ions.
• These are known as Anions.

Explanation

In the modern periodic table, there are 18 groups (vertical columns) and 7 periods (horizontal rows).

Explanation

• A chemical change, also known as a chemical reaction.
• It is a process that alters the composition of one or more substances, resulting in the formation of new substances with different properties.

Explanation

• Gallium-67 is commonly used for the detection of prolonged infection and cancer cells.
• Gallium-67 citrate scans are frequently employed in nuclear medicine to locate inflammatory processes and malignant tumors.