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1. Demonstration of osmosis through potato. Write the observations and explain the result in detail. (Ques no. 9 of NCERT textbook, pg. 67) 2. Find out the number of chromosome present in 10 different adult organisms. 3. Describe the Contribution of various scientist involved in the discovery of the following cell organelles. a. Plastids b. Mitochondria Please help me out with these questions ...?
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1. Demonstration of osmosis through potato. Write the observations and...
1.i) Water gathers in the hollowed portions of set-up B and C because water enters the potato as a result of osmosis. Since the medium surrounding the cell has a higher water concentration than the cell, the water moves inside by osmosis. Hence, water gathers in the hollowed portions of the potato cup.

(ii) Potato A in the experiment acts as a control set-up. No water gathers in the hollowed portions of potato A.

(iii) Water does not gather in the hollowed portions of potato A because potato cup A is empty. It is a control set-up in the experiment.

Water is not able to enter potato D because the potato used here is boiled. Boiling denatures the proteins present in the cell membrane and thus, disrupts the cell membrane. For osmosis, a semi-permeable membrane is required, which is disrupted in this case. Therefore, osmosis will not occur. Hence, water does not enter the boiled potato cup.

2.Man have 46 chromosome

cat has 38

cattle has 60

chicken has 78

Dog has 78

Donkey has 62

frog has 26

fruit flies has 8

Grasshopper has 24 pairs.

3. a.Plastids werediscovered and named by Ernst Haeckel, but A. F. W. Schimper was the first to provide a clear definition.
b.Richard Altmann, in 1890, established them as cell organelles and called them "bioblasts". The term "mitochondria" was coined by Carl Benda in 1898. Leonor Michaelis discovered that Janus green can be used as a supravital stain for mitochondria in 1900.
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Read the text carefully and answer the questions:Cell organelles are enclosed by membranes. Cell organelles are the endoplasmic reticulum, Golgi apparatus, lysosomes, mitochondria and plastids. The endoplasmic reticulum (ER) is a large network of membrane-bound tubes and sheets. It looks like long tubules or round or oblong bags. There are two types of ER rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER). RER looks rough under a microscope because it has particles called ribosomes attached to its surface. The ribosomes, which are present in all active cells, are the sites of protein manufacture. The Golgi apparatus, first described by Camillo Golgi, consists of a system of membrane-bound vesicles arranged approximately parallel to each other in stacks called cisterns.Q.The cell organelle involved in forming complex sugars from simple sugars are

Read the text carefully and answer the questions:Cell organelles are enclosed by membranes. Cell organelles are the endoplasmic reticulum, Golgi apparatus, lysosomes, mitochondria and plastids. The endoplasmic reticulum (ER) is a large network of membrane-bound tubes and sheets. It looks like long tubules or round or oblong bags. There are two types of ER rough endoplasmic reticulum (RER) and smooth endoplasmic reticulum (SER). RER looks rough under a microscope because it has particles called ribosomes attached to its surface. The ribosomes, which are present in all active cells, are the sites of protein manufacture. The Golgi apparatus, first described by Camillo Golgi, consists of a system of membrane-bound vesicles arranged approximately parallel to each other in stacks called cisterns.Q.Which cell organelle plays a crucial role in detoxifying many poisons and drugs in a cell?

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1. Demonstration of osmosis through potato. Write the observations and explain the result in detail. (Ques no. 9 of NCERT textbook, pg. 67) 2. Find out the number of chromosome present in 10 different adult organisms. 3. Describe the Contribution of various scientist involved in the discovery of the following cell organelles. a. Plastids b. Mitochondria Please help me out with these questions ...?
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1. Demonstration of osmosis through potato. Write the observations and explain the result in detail. (Ques no. 9 of NCERT textbook, pg. 67) 2. Find out the number of chromosome present in 10 different adult organisms. 3. Describe the Contribution of various scientist involved in the discovery of the following cell organelles. a. Plastids b. Mitochondria Please help me out with these questions ...? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about 1. Demonstration of osmosis through potato. Write the observations and explain the result in detail. (Ques no. 9 of NCERT textbook, pg. 67) 2. Find out the number of chromosome present in 10 different adult organisms. 3. Describe the Contribution of various scientist involved in the discovery of the following cell organelles. a. Plastids b. Mitochondria Please help me out with these questions ...? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 1. Demonstration of osmosis through potato. Write the observations and explain the result in detail. (Ques no. 9 of NCERT textbook, pg. 67) 2. Find out the number of chromosome present in 10 different adult organisms. 3. Describe the Contribution of various scientist involved in the discovery of the following cell organelles. a. Plastids b. Mitochondria Please help me out with these questions ...?.
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