Showing posts with label class9-biology. Show all posts
Showing posts with label class9-biology. Show all posts

Wednesday, 13 May 2020

CBSE Class 9 - Biology - Cell - Fundamental Unit Of Life - 1 Marker Questions (#class9Biology)(#eduvictors)

CBSE Class 9 - Biology - Cell - Fundamental Unit Of Life - 1 Marker Questions

CBSE Class 9 - Biology - Cell - Fundamental Unit Of Life - 1 Marker Questions (#class9Biology)(#eduvictors)
Animal Cell (Image Credits: AJC1, Flickr)

Q1. Name the cell organelle which is commonly called ‘suicidal bag’ of the cell.

Q2. Which cell organelle are termed the ‘powerhouses’ or ‘storage batteries’ of the cell?

Q3. Name cell organelles having double-membrane envelope.

Q4. Name the organelle which is associated with protein synthesis.

Q5. Which organelle of plant cell has chlorophyll pigments in it?

Q6. Who proposed the fluid mosaic model of the structure of the plasma membrane?

Q7. Who coined the term ‘cell’ and in which year?

Q8. Name the scientists who proposed ‘cell theory’.

Sunday, 5 January 2020

CBSE Class 9 - Biology - Why Do We Fall Ill? - Worksheet (#class9Biology)(#eduvictors)

Class 9 - Biology - Why Do We Fall Ill?

Worksheet 

CBSE Class 9 - Biology - Why Do We Fall Ill?  - Worksheet (#class9Biology)(#eduvictors)



Fill in the banks with suitable word(s)

1. Pathogens causing diseases like common cold, influenza, dengue fever, AIDS are ________.

2. Pathogens causing diseases like typhoid, cholera, antrax, tuberculosis are _________.

3. Pathogens causing diseases like skin infections are __________.

4. Pathogens causing diseases like malaria, kala-azar are _________.

Saturday, 21 December 2019

CBSE Class 9 - Biology - Diversity In Living Organisms (Very Short Answer Based Questions) (#CBSEclass9Biology)(#eduvictors)

Diversity In Living Organisms (Very Short Answer Based Questions)CBSE Class 9 - Biology

CBSE Class 9 - Biology - Diversity In Living Organisms (Very Short Answer Based Questions) (#CBSEclass9Biology)(#eduvictors)

Q1: Who introduced the system of scientific nomenclature of organisms?

Q2: In which Kingdom, an organism does not have a well defined nucleus and organelles?

Q3: In the hierarchy of classification, which group will have the largest number of organisms?

Q4: Which in your opinion is more basic characteristic for classifying organism. The place where they live in or the kind of cells they are made of?

Q5: Give examples of the organisms that have cilia and flagellum for moving around.

Q6: In the hierarchy of classification, which group will have the smallest number of organisms and a maximum number of similar characteristics?

Q7: Name the substance which makes the cell wall of fungi.

Q8: Name a symbiotic life form that grows on the bark of a tree as large, coloured patches.

Wednesday, 24 April 2019

Class 9 - Biology - Cell: Fundamental Unit Of Life - Cell Membrane - Structure and Functions (#cbsenotes)(#eduvictors)

Cell Membrane - Structure and Functions

Class 9 - Biology - Cell: Fundamental Unit Of Life

Class 9 - Biology - Cell: Fundamental Unit Of Life - Cell Membrane - Structure and Functions (#cbsenotes)(#eduvictors)
Plasma Membrane Diagram
Image Credits: Ruth Lawson. Otago Polytechnic Wikimedia

Structure:
  1. Cell membrane is also called as plasma membrane or plasma lemma.
     
  2. It is the limiting boundary of each cell which separates the cytoplasm from its surroundings.
  3. It is found in both plant as well as animal cells.
  4. It is the outermost covering of a cell in case of animals and lies below the cell wall in case of plants.
     

Sunday, 21 April 2019

CBSE Class 9 - Biology - Chapter 5 - Fundamental Unit Of Life - Very Short Answers Based Questions (Set-1)

Cell: Fundamental Unit Of Life

Very Short Answers Based Questions (Set-1)
Class 9 Biology

CBSE Class 9 - Biology - Chapter 5 - Fundamental Unit Of Life - Very Short Answers Based Questions (Set-1)
Cell Types: Prokaryotes and Eukaryotes
Image credits: Wikimedia 


1. Name the largest cell of living world ?

2. Amoeba is a _______________ organism.

3. Who gave the fluid mosaic model of plasma membrane?

4. Movement of solvent into the cell is called as_____________ .

5. Which cell organelle is called as the ‘Head quarter of cell’?

Thursday, 24 January 2019

CBSE Class 9 - Biology - Class of Living Organisms (Worksheet-2)(#cbsenotes)(#eduvictors)

Diversity in Living Organisms (Worksheet-2)

Classification

CBSE Class 9 - Biology - Class of Living Organisms (Worksheet-2)(#cbsenotes)(#eduvictors)

Fill in the blanks with suitable words.


1. Grouping of things on the basis of certain common characteristics is called __________.


2. There are two systems of classification — the ________ system and the ________ system.


3. Carolus Linnaeus divided all organisms into two kingdoms - ________ and __________.

4. ________ arranged all living organisms into five kingdoms - Monera, Protista, Fungi, Plantae and Animalia.

Monday, 17 December 2018

CBSE Class 9 - Biology - Chapter 7 - Diversity in Living Organisms (Worksheet) (#eduvictors)(#cbsenotes)

Diversity in Living Organisms (Worksheet)

CBSE Class 9 - Biology - Chapter 7 - Diversity in Living Organisms (Worksheet) (#eduvictors)(#cbsenotes)

Fill in the blanks with suitable words.


1. _____________ is the division of organisms on the basis of characteristics into groups and sub-groups. It helps us in exploring the diversity of life forms.


2. A ___________ which forms the basis of classification, may be a particular form or function.


3. _____________, in 1969 proposed ‘Five kingdoms classification’ of living organisms.


4. In 5 kingdoms classification, the hierarchy can be represented as ___________ sub grouping into _______ for animals or _________ for plants.


Thursday, 11 October 2018

Class 9 - Biology - Why do we fall ill? - Important Definitions (#cbsenotes)(#eduvictors)

Why do we fall ill? - Important Definitions

Class 9 - Biology - Why do we fall ill? - Important Definitions (#cbsenotes)(#eduvictors)

Health: 
A state of being well enough to function well physically, mentally and socially.

WHO defined health as ‘a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity’"

Disease:
Lack of feeling of ease or distress due to impairment of health or a condition of abnormal functioning or structural disorder.

Hygiene :
Condition and practices that help to maintain health and prevent the spread of diseases.


Symptoms:
A series of events occurring that often point to a disease or condition.

Signs:
Objective evidence of disease as identified by physicians or doctors.


Monday, 8 October 2018

Class 9 - 12 - Biology - Know About Disease - Brief Notes About AIDS (#cbsenotes)(#eduvictors)

AIDS(A Brief Introduction)

Class 9 - 12 - Biology - Know About Disease - Brief Notes About AIDS (#cbsenotes)(#eduvictors)


Meaning of AIDS

The word AIDS stands for Acquired Immuno Deficiency Syndrome. This means a deficiency of the immune system, acquired during the lifetime of an individual indicating that it is not a congenital disease [disease or abnormality present from birth]. ‘Syndrome’ means a group of symptoms.


AIDS was first reported in 1981 and in the last twenty-five years or so, it has spread all over the world.

Luc Montagnier, Françoise Barré-Sinoussi, and their colleagues at the Pasteur Institute in Paris were the first to report the discovery of the virus now called the human immunodeficiency virus (HIV) associated with AIDS.


Causes of AIDS

Wednesday, 19 September 2018

CBSE Class 9 - Cell Biology - 7 Points about Plasmolysis (#cbsenotes)(#eduvictors)

Cell Biology - 7 Points about Plasmolysis


Plasmolysis vs Flaccid vs Turgid
Credits: Wikimedia, Author: LadyOfHats

1. When a living plant cell loses water through osmosis there is shrinkage or contraction of the contents of the cell away from the cell wall. This phenomenon is known as plasmolysis
(plasma → fluid; lysis → disintegration, decomposition).


2. Only living cells, and not dead cells, are able to absorb water by osmosis.


3. Cell walls permit the cells of plants, fungi and bacteria to withstand very dilute [hypotonic] external media without shrinkage.


Wednesday, 29 August 2018

Class 9 - Biology - Improvement in Food Resources - Agriculture Improvements (Very Short Questions and Answers) (#cbsenotes)(#eduvictors)

Improvement in Food Resources - Agriculture Improvements 

Class 9 - Biology - Improvement in Food Resources - Agriculture Improvements (Very Short Questions and Answers) (#cbsenotes)(#eduvictors)

(Very Short Questions and Answers) 



Q1: Define crop.

Q2: Name the two major problems for food requirements due to overpopulated country like India?

Q3: Give two examples of scientific management practices to obtain a high yield of crops.
Q4: What are integrated farming practices?

Q5: Give three examples of cereals? Which type of major nutrient do they provide?

Q6: Lentils are rich in ________. Lentils, black gram (urad), green gram (moong) are collectvely called _________.

Q7: Give three examples of oilseeds? Name the major nutrient provided by them.

Q8: What do vegetables, spices and fruits provide?

Q9: What are fodder crops? Give three examples of fodder crops.

Q10: Define photoperiodism. What is its effect on plants?

Friday, 6 July 2018

CBSE CLASS 9 - BIOLOGY - CELL: FUNDAMENTAL UNIT OF LIFE (Worksheet)(#cbsenotes)(#eduvictors)

CELL: FUNDAMENTAL UNIT OF LIFE 


(Worksheet)


Fill in the blanks with suitable words.

1. The fundamental organizational unit of life is the _______.


2. Cells are enclosed by a plasma membrane composed of ________ and _______.


3. Plasma membrane is a __________ permeable membrane.


4. In plant cells, a cell wall composed of _________ is located outside the cell membrane.


5. In prokaryotes, the nuclear membrane is ________.


Friday, 16 November 2012

CBSE Class 9 - Science - Why do we Fall ill? (MCQs)

Why do we Fall ill
CBSE Class 9 - Science - Why do we Fall ill? (MCQs)
(MCQs)

Q1: Which one of the following is an infectious disease?

(a) diptheria
(b) diabetes
(c) hypertension
(d) cancer


Q2: Elephantiasis disease can have

(a) short-term affect on our health
(b) no effect on our health
(c) long term affect on our health
(d) sometimes bad effect on our health


Wednesday, 6 June 2012

CBSE Class 9 - Biology - CH6 - Tissues (Set-1)

PLANT TISSUES 

MCQs, NCERT Chapter Solutions and Q & A (asked in CBSE examination)

MCQs

Q1: The study of tissues is called ...
a) cytology
b) embryology
c) histology
d) pathology

Answer: c) histology


Q:2 Which of the following statement is NOT true?
(a) Most of the plant tissues are the supportive type.
(b) Tissues ensure the division of labour.
(c) Sedentary existence contributes to the organ system design in animals.
(d) Organ systems are far more complex in animals than in plants.