class 10 th
science biology chapter 1
full chapter NOTES...
Answers
Properties of Living Beings Compared to Non - living -
Movement
Grow
Need Food
Excrete
Respiration
Reproduce
The major criterion which is used to decide whether something is alive or not alive is movement. The movement in animals is fast and can be observed easily but the movement in plants is slow and observed with difficulty. Animals can move from one place to another or they can move their body parts. The plants can only move parts of their body such as leaves, flowers, roots and shoots.
Life Processes - Life processes are processes undergoing in living organisms to sustain life. For example: Reproduction, Excretion, Respiration and Growth.
Nutrition -
The Process of taking of food inside the body and converting it into smaller molecules which can be absorbed by the body is called Nutrition.
Need of nutrition: Nutrition is needed to provide energy for doing any activity and provide essential nutrients for life processes.
Nutrients: Materials which provide nutrition to organisms are called nutrients. For example,
Carbohydrates and fats are the nutrients which are used by the organism mainly as a source of energy. These nutrients are found in wheat, rice, corn, chocolates etc. So when you eat them you feel energetic.
Proteins, vitamins and mineral are nutrients used for making body parts like skin, blood, bones etc.
Examples of these nutrients are keratin (protein), elastin (protein), collagen (protein), vitamin A, vitamin B, vitamin E, iron (mineral), calcium (mineral) and many more. These nutrients are found in onions, fish, potatoes, milk, beet root and in many other vegetables and fruits.
Mode of Nutrition -
Question 1
Which is the basic requirement of living organisms for obtaining energy?
Solution 1
Food is the basic requirement of living organisms for obtaining energy.
Question 2
Which of the following type of energy is used by living organisms to perform vital life process?
Kinetic energy, Chemical energy, Potential energy, Nuclear energy
Solution 2
Chemical Energy.
Question 3
Which of the following is an autroph?
Green plant or Man
Solution 3
Green Plant.
Question 4
Name two inorganic substances which are used by autrophs to make food.
Solution 4
Carbon dioxide and Water.
Question 5
What is the mode of nutrition in fungi?
Solution 5
Saprotrophic.
Question 6
Name one organism each having saprophytic, parasitic and holozoic modes of nutrition.
Solution 6
Saprophytic - Fungi.
Parasitic - Plasmodium.
Holozoic - Human Beings.
Question 7
Name the process by which plants make food.
Solution 7
Photosynthesis.