Explanation

Lost organ refers to a characteristic that is acquired due to injury or environmental factors.

It is not passed down to offspring, making it non-heritable.

Traits like eye color, height, and detached ear lobes are genetically inherited.

Explanation

• Rickets is a disease caused by a deficiency of Calcium and Vitamin D.
• It leading to softening of the bones in children.
• It can cause bowed legs, stunted growth, and skeletal deformities.

Explanation

In general, the cancer in a human body is caused by changes to DNA.

DNA stands for Deoxyribonucleic acid

Explanation

HIV is a virus spread through certain fluids in body that attacks the body’s immune system. 

HIV stands for Human immunodeficiency virus

Explanation

Pathogenic bacteria are harmful microorganisms that cause diseases in humans, animals, or plants.

Examples include E. coli, Salmonella, and Streptococcus.

Explanation

Children under 5 are most vulnerable to waterborne diseases due to their developing immune systems and high susceptibility to dehydration.

Poor sanitation and contaminated water sources can severely impact young children, leading to high mortality rates in this age group.

Explanation

Glaucoma is caused by an increase in pressure within the eyeball, specifically in the fluid pressure inside the eye.

This increased pressure can damage the optic nerve and lead to vision loss if left untreated.

Explanation

Smoking (especially of tobacco or cannabis) is often considered a gateway behavior that can lead to experimenting with harder substances.

It is widely observed as a first step in the path toward more serious drug addiction.

Explanation

White blood cells (WBCs) are the body's defense cells that fight infections and diseases.

They identify and destroy harmful bacteria, viruses, and other pathogens.

Explanation

Alzheimer's disease is a neurological disorder that primarily affects brain function.

It leading to memory loss and cognitive decline.