Explanation

Bile is a digestive fluid produced by the liver and stored in the gallbladder, but it does not contain digestive enzymes.

Instead, bile contains bile salts, which help emulsify fats, making them easier for enzymes like lipase to break down.

Explanation

Mesosomes are infoldings of the bacterial plasma membrane that help in cellular respiration, DNA replication, and cell division.

Since bacteria lack mitochondria, mesosomes function similarly to mitochondria by aiding in ATP (energy) production.

Explanation

Explanation

The Widal test is used to diagnose Typhoid fever.

It detects antibodies against Salmonella typhi and Salmonella paratyphi, the bacteria responsible for typhoid.

It is a serological test that checks for agglutination (clumping) of bacteria in response to specific antigens.

Explanation

Amphibians, such as frogs and toads, have a 3-chambered heart.

- The three chambers are:

    1. Two atria (upper chambers)

    2. One ventricle (lower chamber)

Explanation

Pinworms (Enterobius vermicularis) are roundworms that cause infections in the human intestines.

They are common in children.

It spread through contaminated surfaces or hands.

Explanation

Poriferans are simple aquatic animals with porous bodies, commonly known as sponges.

They belong to the phylum Porifera and lack true tissues and organs.

Explanation

Animals cannot use atmospheric nitrogen directly; they obtain nitrogen by consuming proteins in food.

These proteins are broken down into amino acids, which are used for growth and repair of body tissues.

Explanation

Plasmodium is a protozoan parasite that causes malaria in humans.

It belongs to the phylum Apicomplexa, which includes other parasitic protozoa.

Explanation

Giraffes use infrasonic waves (low-frequency sounds) to communicate over long distances.

These sounds are below the human hearing range.

It help in coordination and alerting others about predators.