S Chand Biology Class 10 Life Processes Pdf 48

Question 2:Which of the following type of energy is used by living organisms to perform vital life processes ?Kinetic energy, Chemical energy, Potential energy, Nuclear energySolution :Chemical Energy.

S Chand Biology Class 10 Life Processes Pdf 48

Question 41:(a) What criteria can be used to decide whether something is alive ?(b) What is meant by life processes ? Name the basic life processes common to all living organisms which are essential for maintaining life.Solution :(a) The criteria to decide whether something is alive is the movement.(b) The basic functions performed by living organisms to maintain their life on this earth are called life processes. The basic life processes common to all living organisms are ? Nutrition and Respiration; Transport and Excretion; Control and Coordination; Growth; Movement and Reproduction.

(a) What criteria can be used to decide whether something is alive?(b) What is meant by life processes? Name the basic life processes common to all living organisms which are essential for maintaining life.

(a) Movement is the criteria used to decide whether something is alive.(b) The basic functions performed by the living organisms to maintain their life on the Earth are known as life processes. The basic life processes common to all living organisms and essential for maintaining life are nutrition, growth, movement, respiration, transportation, reproduction, excretion and control and coordination.

(a) Following are the steps involved in the nutrition in Amoeba:(i) Ingestion: Amoeba ingests food along with a little amount of the surrounding water. It does this using its pseudopodia and forms a food vacuole.(ii) Digestion: The food in the food vacuole is digested by the digestive enzymes that enter from the cytoplasm.(iii) Absorption: The digested food is directly absorbed in the cytoplasm of the Amoeba cell by diffusion.(iv) Assimilation: Some part of the digested food is used for acquiring energy for various life processes. This is done through respiration.(v) Egestion: The undigested food is thrown out of the body through the cell membrane.(b) An Amoeba has holozoic mode of nutrition.(c) The process of obtaining food by Amoeba is called phagocytosis. It means cell feeding.

Which of the following is an incorrect statement?(a) energy is essential for life processes(b) organisms grow with time(c) movement of molecules does not take place among cells(d) organisms must repair and maintain their body

(a) Respiration is a vital function of the body because it provides energy for carrying out all the life processes that are necessary to keep the organisms alive. Most living things need oxygen to obtain energy from food. This oxygen reacts with the food molecules present in the body cells and burns them slowly to release energy. This energy is stored as ATP molecules in the cells. The process of releasing energy from food is called respiration.(b)Aerobic RespirationAnaerobic RespirationIt takes place in the presence of oxygen.It takes place in the absence of oxygen.Complete breakdown of food occurs in aerobic respiration.Partial breakdown of food occurs in anaerobic respiration.The end products are carbon dioxide and water.The end products may be ethanol and carbon dioxide (as in yeast cells) or lactic acid (as in muscle cells).It produces a considerable amount of energy.Much less energy is produced in anaerobic respiration.(c) (i) Anaerobic respiration takes place in yeast.(ii) Aerobic respiration takes place in humans.

All living organisms are made up of basic building blocks that form the fundamental unit of life called cells. Be it plants, animals, or microorganisms; these simple biological units define all their structural and functional abilities. An in-depth analysis of the discovery of cells, who discovered cells and how, their types, components, functions, and much more is given in the 5th Chapter- The Fundamental Unit of Life in the CBSE class 9 syllabus of science. To make your learning experience wonderful, here are our fundamental unit of life class 9 notes.

Cells form the basic structure of an organism and a collection of similar cells that perform an organized function from a Tissue. Each tissue serves a particular purpose and can be combined with other tissues to form organs. These carry out essential life processes like metabolism, growth, reproduction, etc. in unicellular and multicellular organisms. Here are some examples of tissues and organs in plants and animals:

Regardless of the complexity as well as the type of organism, cells are mainly divided into two categories. Mentioned below is a distinction between the 2 major types of cells in our fundamental unit of life class 9 notes:

Now that you are through with the aforementioned components of the cell, let us now study the last one in detail in our fundamental unit of life class 9 notes. The cell organelles play a very important role in the functioning of the human body. Have a look at their explanations-

Hopefully, through this fundamental unit of life class 9 notes, you are well versed in this chapter of biology. Consult Leverage Edu experts for career counselling and have a better understanding of which career path to choose.