Showing posts with label class10-biology. Show all posts
Showing posts with label class10-biology. Show all posts

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 5 September 2018

CBSE Class 10 - Biology - Reproduction in Plants - Very Short Questions Answers (#cbsenotes)(#eduvictors)

Reproduction in Plants 

Class 10 Biology

Stamen, Anthers: Credits: Sandeep Handa


Very Short Questions Answers


Q1: Write two ways in which pollination may occur in plants.

Answer: The two ways in which pollination may occur in plants are:
Self-pollination.
Cross-pollination.


Q2: Name the three agents of pollination.

Answer: The three agents of pollination are:
Insect
Wind
Water


Q3: Name any three agencies for dispersal of seeds.

Answer:
Wind
Water
Man and animals, birds, bats, squirrels.


Friday 13 July 2018

CBSE Class 10 - Biology - Our Environment - Revision Assignment (#cbsenotes)(#eduvictors)

Biology - Our Environment 

Revision Assignment

CBSE Class 10 - Biology - Our Environment - Revision Assignment (#cbsenotes)(#eduvictors)


ONE MARK QUESTIONS

1. Using Kulhads as disposable cups to serve tea in trains, proved to be a bad idea. Why?

2. Why is plastic not degraded by bacteria?


TWO MARK QUESTIONS

3. DDT has entered the food chain. Which food habit is safer- vegetarian or non-vegetarian?

4. Classify the flowing as decomposers and producers Green plants, bacteria, fungi, algae, blue-green algae.

5. Distinguish between producers and consumers.

6. Name two environment-friendly practices.

7. Write any two ways of energy flow through an ecosystem.

Thursday 24 May 2018

CBSE CLASS 10 - Biology - Control and Co-ordination (Important Questions) (#cbsenotes)(#eduvictors)

Control and Co-ordination

(Important Questions to Revise)
CBSE CLASS 10 - Biology - Control and Co-ordination (Important Questions) (#cbsenotes)(#eduvictors)


ONE MARK QUESTIONS

1. Which endocrine gland is unpaired?

2. Which part of the brain controlled posture and balance of the body?

3. Where in a neuron, conversions of electrical signal to a chemical signal occur?

4. Which gland secretes digestive enzyme as well as hormones?

5. We suddenly withdraw our hand when a pin pricks. Name the type of response involved in this action.

6. Name the hormone which helps in regulating sugar level in our blood? Name the gland which secretes this hormone?

7. State the main function of abscises acid

Thursday 3 May 2018

CBSE CLASS-X - SCIENCE ASSIGNMENT-MANAGEMENT OF NATURAL RESOURCES (#cbsenotes)(#eduvictors)

MANAGEMENT OF NATURAL RESOURCES
ASSIGNMENT

CBSE CLASS-X - BIOLOGY ASSIGNMENT-MANAGEMENT OF NATURAL RESOURCES (#cbsenotes)(#eduvictors)

1) When was Ganga action plan project (gap) started and why was it started?

2) Name the type of bacteria whose presence in water causes intestinal disorders?

3) How does Ganga water pollute? List at least four human activities.

4) How do industries pollute the Ganga water?

5) What leads to the killing of fish in the large section of Ganga water?

6) What is the PH of water?

Sunday 22 April 2018

CBSE CLASS 12 - Biology - Digestion - Five Digestive Juices (#cbsenotes)(#eduvictors)

Digestion - FIVE DIGESTIVE JUICES

CBSE CLASS 12 - Biology - Digestion - Five Digestive Juices (#cbsenotes)(#eduvictors)
Image credits: LadyOfHats (Wikimedia)

There are five digestive juices i.e.

Saliva,

Gastric juice

Pancreatic juice

Intestinal juice (succus entericus)

Bile juice

Sunday 7 January 2018

CLASS 10 - Biology - Heredity and Evolution – Unit Test Paper (#cbsePapers)(#eduvictors)

Heredity and Evolution
Unit Test Paper

CLASS 10 - Biology - Heredity and Evolution – Unit Test Paper (#cbsePapers)(#eduvictors)

Q1: Define the following:
a) Inheritance
b) Heredity
c) Phenotype
d) Genotype

Q2: How does the creation of variation in a species promote survival?


Q3: Give scientific reasons:

i. In sexual mode of reproduction greater diversities are generated.

ii. Phenotypic and genotypic ratios are different.

iii. A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants


Q4: How do genes regulate the height of a plant ?


Friday 27 October 2017

CBSE Class 10 - Biology - Study Notes about Plant Growth Hormones (Phytohormones) (#cbseNotes)

Plant Hormones (Phytohormones)

CBSE Class 10 - Biology - Study Notes about Plant Growth Hormones (Phytohormones) (#cbseNotes)


Plant hormones or phytohormones are small, simple chemical molecules, which are present in low concentration in plants and regulate growth, differentiation and development.


Two Categories of Phytohormones:

Plant growth promoters: Examples are auxins, gibberellins and cytokinins.
Plant growth inhibitors: Examples are abscisic acid, ethylene.


All about Auxins
Auxins are weakly acidic growth hormones.

Darwin (1880) was first to find about Auxins in the tip of canary grass.

These hormones are found in shoot apex, leaf Primordia and developing seeds.

Wednesday 27 September 2017

CBSE Class 10 - Biology - Heredity and Evolution - Origin Of Life On Earth (Concept Points) (#cbseNotes)

Origin Of Life On Earth (Concept Points)

CBSE Class 10 - Biology - Heredity and Evolution - Origin Of Life On Earth (Concept Points) (#cbseNotes)


Most scientists believed that life arose from nonliving matter, mostly from gases. It originated in primitive form in the oceans of the earth.

4 billion years ago, the primitive atmosphere was formed. It had little oxygen and was likely thick with water vapor, along with compounds released by volcanic eruptions, such as nitrogen oxides, carbon dioxide, methane, ammonia, and hydrogen.

Sunday 17 September 2017

CBSE Class 10 - Biology - - Arteries vs Veins (#cbseNotes)

Biology - Arteries vs Veins

Areteries vs Veins
credits: Kelvinsong (Wikimedia) under CC-BY-SA-3.0


Arteries and Veins are parts of closed circulatory system and both carry blood. Here follows the differences between the two:


Tuesday 5 September 2017

CBSE Class 10 - Biology - Life Processes (TRANSPORTATION and EXCRETION) - Assignment Sheet (#cbseNotes)

TRANSPORTATION & EXCRETION (Biology - Life Processes) - Assignment Sheet

CBSE Class 10 - Biology - Life Processes (TRANSPORTATION and EXCRETION) - Assignment Sheet (#cbseNotes)

1. Name any 5 substances transported by human blood.


2. Describe briefly the composition of blood.


3. Write the functions of the following :
a) Red Blood Cells
b) White Blood Cells
c) Blood Platelets
d) Plasma
e) Lymph
f) Bicuspid and Tricuspid valves
g) Pericardial Fluid

Saturday 2 September 2017

CBSE Class 10 - Biology - Asexual reproduction vs Sexual reproduction (#cbseNotes)

Asexual reproduction vs Sexual reproduction

CBSE Class 10 - Biology - Asexual reproduction vs Sexual reproduction (#cbseNotes)



No. Asexual reproduction Sexual reproduction
1. Only One parent is involved. Both male and female parents are involved.
2. Occurs in unisexual plants. Occurs in bisexual plants.
3. Occurs in lower plants. Occurs in higher plants and animals.
4. Reproductive organs are not present Fully developed reproductive parts are present.

Friday 1 September 2017

CBSE Class 10 - BIOLOGY ASSIGNMENT - CONTROL AND COORDINATION (#cbseNotes)

CONTROL AND COORDINATION (BIOLOGY ASSIGNMENT)

CBSE Class 10 - BIOLOGY ASSIGNMENT - CONTROL AND COORDINATION (#cbseNotes)


1. What are gustatory and olfactory receptors?

2. Draw a diagram of neuron and neuro muscular function.

3. What is synapse?

4. What is reflex arc?

5. Draw a diagram to show reflex arc

6. What does CNS comprise of? Write its function.

7. What is peripheral nervous system? Write its functions.

8. Name the three parts and regions of brain.

9. Why forebrain is main thinking part of brain?

10. How sensation of feeling full stomach is felt?

Tuesday 29 August 2017

CBSE Class 10 - Science - Life Processes - Pathway of Air (#cbseNotes)

 Life Processes - Pathway of Air
(Breathing Process)

CBSE Class 10 - Science - Biology
CBSE Class 10 - Science - Life Processes - Pathway of Air  (#cbseNotes)

Breathing process involves a the pathway of air from nostril to alveolus. It is a physical process. The pathway is described as follows:




Nostrils:        
Air usually enters the body through the nostrils.
Nasal cavity:
Air is filtered. The moist surface of the lining of the nasal cavity, and the hairs growing from its sides, remove some of the tiny particles of dirt in the air. In addition, as the inhaled air passes through the nasal cavity, its temperature is brought close to that of the body, and it takes up water vapour so that it becomes more moist than before.

Wednesday 7 June 2017

CBSE Class 10 - Biology - Life Processes - 51 Questions You must Revise (#cbseNotes)

LIFE PROCESSES
51 Questions You must Revise

(Revision Questions based on NCERT Chapter)
CBSE Class 10 - Biology - Life Processes - 51 Questions You must Revise (#cbseNotes)


Q1: Define nutrition.

Q2: Is the presence of only one life process sufficient to decide whether an object is living or non-living?

Q3: Explain the types of heterotrophic nutrition on the basis of food habit.

Q4: What is the role of iodine solution in activity 6.1?

Q5: Give scientific reason. Unwanted and harmful waste products need to be eliminated from the body.

Q6: What is the role of KOH in activity 6.2?

Q7: What is the function of pancreas in human digestive system?


Sunday 4 June 2017

CBSE Class 10 - Biology - Life Processes (Holiday Assignment) Q & A (#cbsenotes)

Life Processes 

(Assignment Q & A) 

CBSE Class 10 - Biology - Life Processes (Holiday Assignment) Q & A (#cbsenotes)
Structure Of Leaf
credits: Zephrys, undr CCAS 3.0, Wikimedia Commons


Q1. Where are chloroplasts present in the leaf?

Answer: Below the epidermis, there are layers of palisade cells that contain chloroplasts.


Q2.  Name the pigments that can absorb solar energy. Also name the enzyme required for photosynthesis.

Answer: Chlorophyll. RuBisCo (Ribulose-1,5-bisphosphate carboxylase/oxygenase), a protein enzyme is required to initiate photosynthesis.

(Note: RuBisCo is the most abundant protein in the world due to its presence in green plants.)


Q3. Name one organism each having saprophytic and parasitic and holozoic nutrition.

Answer:
Saprophytic: Mushroom, yeast
Parasitic: Cuscutta (Dodder plant), Ring Worm, Leech
Holozoic: Human, amoeba


Q4. Enlist two functions of bile juice of liver.

Answer:
1. Bile neutralized the acidic medium of food coming from stomach and  makes it alkaline.
2. It breaks the large fat globules into smaller ones, this increases the enzyme action.

Friday 7 April 2017

CBSE Class 10 - Biology - Life Processes (Nutrition) - Q and A (#cbsenotes)

Life Processes (Nutrition)  

Q and A
CBSE Class 10 - Biology 
CBSE Class 10 - Biology - Life Processes (Nutrition) - Q and A (#cbsenotes)

Q1: Define nutrition.

Answer: The process of taking in food or consuming food and utilising it is called nutrition.


Q2: What are the modes of nutrition?

Answer:
Autotrophic
Heterotrophic


Q3: What is a nutrient?

Answer: A nutrient is a substance in food that performs a physiological function in the body. A nutrient gives energy and promotes growth and development of the body.


Q4: What happens if there is a deficiency of a particular type of nutrient? Give an example.

Answer: There may be a deficiency disorder. e.g. deficiency of Vitamin C causes capillaries break easily and often leads to bleeding of gums.


Q5: Name the different classes of nutrients.

Answer: Carbohydrates, Lipids, Proteins, Minerals, Vitamins and Water.

Monday 21 November 2016

Class 10 - Biology - How Do Organisms Reproduce? - Worksheet

Reproduction 


Longitudinal Section of a Bisexual Flower
Label the parts of the flowers (answer given in this post)
image credits: wikimedia

Worksheet


Fill in the blanks


1. In _________, many bacteria and protozoa simply divide into two or more daughter cells.


2. __________ is associated with the stability of population of species.


3. The fertilized egg gets implanted in the lining of the ________.


4. In mammals, the embryo gets nutrition from the mother’s blood with the help of a special tissue called _________.

Monday 6 June 2016

CBSE Class 10 - Science - CH7: Control and Coordination (VSQA)

CONTROL AND COORDINATION

CBSE Class 10 - Science - CH7: Control and Coordination (VSQA)

Very Short Question And Answers



Q1: Which chemical induces artificial ripening of fruits?

Answer: Ethylene


Q2: What is stimulus?

Answer: The changes in the environment to which an organism responds and reacts is called stimulus.


Q3: Name the longest cell present in the human body.

Answer: Neuron is the longest cell in the human body.


Q4: Give examples of glands which act as both endocrine and exocrine.

Answer: Pancreas, Testes, Ovaries


Q5: What are nastic movements?

Answer: Movements of plants which are independent of stimuli are called nastic movements. e.g. movement by Touch-Me-Not (Mimosa) plant i.e. leaves close or droop when touched.


Q6: Where do you find gustatory receptors?

Answer: On the tongue.


Q7: What do olfactory receptors detect?

Answer: They detect smell.


Q8: Name the hormone released by thyroid gland.

Answer: Thyroxin.


Q9: Where is Hypothalmus is located?

Answer: In the brain.