Explanation

A moving charged particle is surrounded by both an electric field and a magnetic field.

The electric field is due to the charge itself, and the magnetic field is generated due to the particle's motion.

Explanation

The velocity of an electron is maximum in 1st shell

because according to Bohr's model

So we have velocity of electron = 2.188 ×10^6 m/s.

By calculation, we gained velocity= 1.094×10^6 m/s.

So it is determined that the velocity is decreased as we move from lower to higher shell

Explanation

Cell Membrane is made of Lipids and proteins

It is also called the plasma membrane

It consists of a lipid bilayer that is semipermeable.

They are found in all cells and separate the interior of the cell from the outside environment.

They regulate the transport of materials entering and exiting the cell.

Explanation

Melting ice below 0°C by applying pressure is a spontaneous physical change. 

Physical change:

This is correct because the process only changes the state of water from solid to liquid, without altering its chemical composition. 

Spontaneous:

• Under the applied pressure, the ice will naturally melt even below 0°C.
• A spontaneous process occurs without any external energy input. 

Explanation

 A buffer is a solution that resists change in its pH. 

A buffer solution is composed of a weak acid and its conjugate base (or a weak base and its conjugate acid).

When a small amount of a strong acid or base is added to a buffer,

The added ions react with the components of the buffer to maintain a relatively constant pH. 

Explanation

 QGIS (Quantum GIS) is widely used in wildlife surveys for mapping habitats, tracking animal movements, analyzing spatial data, and planning conservation strategies.

It allows researchers to visualize and interpret ecological data efficiently.

Explanation

Species diversity refers to the variety of species within a specific ecosystem, region, or the entire planet. It includes:

1. Species richness - The number of different species in a given area.

2. Species evenness - The relative abundance of each species in the area.

Explanation

Autumn leaves appear red and yellow because carotenoids are revealed.

This happens when chlorophyll breaks down in response to less sunlight.

Shown is a colour photograph of bright red and yellow flowers with green stems and leaves.

Explanation

Endocytosis is the process by which cells engulf bulk material from their external environment by forming a vesicle around it.

This is a key mechanism for taking in large molecules or particles that cannot pass through the cell membrane by diffusion.

Explanation

• Match the digestive system with one of the following: Metameric
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• There are four main functions of the digestive system which are Motility, Digestion, Absorption, and Secretion.