Explanation

The correct chemical equation for photosynthesis is:

6CO₂ + 6H₂O → sunlight/chlorophyll C₆H₁₂O₆ + 6O₂

This equation shows that carbon dioxide and water are converted into glucose and oxygen in the presence of sunlight and chlorophyll.

Explanation

The pinna is the outer part of the ear that collects sound waves and directs them into the ear canal.

From there, sound waves travel to the ear drum and further into the inner ear for processing.

Explanation

Asexual reproduction in plants is commonly referred to as vegetative propagation or vegetative reproduction.

It involves the formation of new plants from parts of the parent plant, like stems, roots, or leaves, without the involvement of seeds.

Explanation

In layering, a branch of a plant is bent down to the soil, partially buried, and encouraged to form roots, eventually growing into a new plant.

This method is often used for plants like strawberries and jasmine.

Explanation

Motor neurons carry impulses away from the central nervous system to effectors like muscles or glands.

They are responsible for triggering responses such as muscle movement.

Explanation

Neurons transmit messages through electrical impulses (action potentials) and chemical signals (neurotransmitters), forming an electrochemical wave.

These signals travel across the neurons and synapses to communicate information throughout the body.

Explanation

Animals are biotic components of the environment because they are living organisms.

Soil, Sun, Water, and Temperature are abiotic components as they are non-living factors that influence ecosystems.

Explanation

The state of inactivity in animals during summer or dry season is called aestivation (or estivation).

Purpose: To conserve energy and prevent water loss during arid, high-temperature conditions.

Duration: Lasts for the duration of the hot/dry season, ranging from weeks to months, or even years in some cases.

Explanation

• In the human heart, blood returning from the lungs via the pulmonary veins drains into the left atrium.
• From there, it flows through the mitral valve into the left ventricle, which pumps it out to the rest of the body through the aorta.

Explanation

Starfish belong to the phylum Echinodermata, which includes marine animals with radial symmetry and a water vascular system.

They have a tough, spiny skin and can regenerate lost arms, making them unique among marine organisms.