Explanation

Papaya is a dioecious plant, meaning male and female flowers are on separate plants, so it relies on cross-pollination.

In contrast, pea and tomato plants usually undergo self-pollination.

Explanation

The main enzyme used to make cheese is rennet (also known as rennin).

Rennet is a milk-clotting enzyme that causes milk to curdle, which is a crucial step in cheese production. 

Explanation

The cell wall is present in plant cells but absent in animal cells.

It provides structural support and protection.

It is is made of cellulose in plants.

Explanation

The atmosphere is the gaseous layer that surrounds the Earth.

It is composed mainly of nitrogen, oxygen, and trace gases.

It plays a crucial role in protecting life on Earth by filtering harmful radiation and regulating temperature.

Explanation

Cyclones are formed when air moves from high-pressure to low-pressure areas, causing a rotating storm system.

This movement creates strong winds and often heavy rainfall, common in tropical regions.

Explanation

About 40-50% of the body's weight is due to muscles.

Muscles are the largest component in terms of body mass after bones.

The remaining body weight is distributed between bones, skin, organs, and other tissues.

Explanation

Sewage-contaminated water increases the biological oxygen demand (BOD), which depletes the dissolved oxygen levels in the water.

Fish and other aquatic animals rely on dissolved oxygen to breathe. When the oxygen levels drop significantly, it leads to suffocation and death of these organisms.

Explanation

Sausage, pepperoni, and salami are types of fermented meat products.

These are made through the fermentation of meat.

It often with the help of bacteria or yeast, which preserves the meat and enhances its flavor.

Explanation

Gram seed has an embryo located near the center of the seed, not at one side.

Endosperm is absent in gram seed, and it has two cotyledons.

Explanation

Chymosin is an enzyme used as a clotting agent in the production of GMO cheese, helping to coagulate milk.

It is often produced using genetically modified microorganisms to ensure consistent quality and supply.