Table of Contents
Why do we need to be concerned about disease transmission?
Because infectious diseases can spread through direct or indirect contact, everyone is at risk of illness. You have a higher risk of becoming ill when you’re around sick people or in areas susceptible to germs.
How would a person develop those diseases that don’t spread by contact with the sick person?
Deficiency diseases like scurvy, Kwashiorkor, anaemia etc are caused by inadequate diet. Inherited diseases like haemophilia are caused by passing of defective genes from parents to offspring. Degenerative diseases like arthritis are caused by wearing away of organs and tissues usually with age….
Why do we fall ill 8?
We fall ill because we live in an area with polluted surroundings or lack of personal hygiene. It is very important to adopt certain strategies to stay healthy and prevent diseases.
How is virus created?
Viruses may have arisen from mobile genetic elements that gained the ability to move between cells. They may be descendants of previously free-living organisms that adapted a parasitic replication strategy. Perhaps viruses existed before, and led to the evolution of, cellular life.
How old are viruses on earth?
They existed 3.5 billion years before humans evolved on Earth. They’re neither dead nor alive. Their genetic material is embedded in our own DNA, constituting close to 10% of the human genome….
What is an atom short answer?
An atom is the smallest component of an element and the building blocks of all matter, characterized by sharing of the chemical properties of the element and a nucleus with neutrons, protons, and electrons. Answer verified by Toppr.
What are atoms Class 9?
Atom is the smallest particle that takes part in a chemical reaction. Atoms of different elements combine with each other in a simple whole number ratio to form compound. The relative number and kinds of atoms are constant in a given compound.
Why do we fall ill Questions?
1. These diseases can be transmitted from an infected person to a healthy person. 1. These diseases cannot be transmitted….Why Do we Fall Ill Class 9 Extra Questions Short Answer Questions-II.
| Vitamin | Deficiency Diseases |
|---|---|
| K | Bleeding disease |
What are 5 diseases caused by virus?
Viral diseases
- smallpox.
- the common cold and different types of flu.
- measles, mumps, rubella, chicken pox, and shingles.
- hepatitis.
- herpes and cold sores.
- polio.
- rabies.
- Ebola and Hanta fever.
Why do we fall?
So we can learn to pick ourselves up.”
Why do we fall ill 9 notes?
Any disturbance in the structure or function of any organ or part of body. It may be caused due to the attack of pathogens (virus, bacteria), lack of nutritious diet/balanced diet and lack of public health services. The disease which lasts for only a short period of time is called Acute Disease.
What are the diseases that are not spread?
A noncommunicable disease is a noninfectious health condition that cannot be spread from person to person. It also lasts for a long period of time. This is also known as a chronic disease. A combination of genetic, physiological, lifestyle, and environmental factors can cause these diseases.
What is called an atom?
Atoms are the basic units of matter and the defining structure of elements. The term “atom” comes from the Greek word for indivisible, because it was once thought that atoms were the smallest things in the universe and could not be divided.