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

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.

Friday, 4 March 2016

CBSE Class 10 - Biology - Heredity and Evolution - Do Not Miss These Important Definitions and Terms

Heredity and Evolution

CBSE Class 10 - Biology - Heredity and Evolution  - Do Not Miss These Important Definitions and Terms

Important Definitions and Terms



Q1: Define Genetics

Answer: Genetics is the branch of Biology which deals with the study of heredity and variation.


Q2: Define Heredity

Answer: Heredity refers to process by which certain features (inheritable) are transmitted from parent to offspring.


Q3: Define Variation

Answer: Offspring of same parents do not exactly resemble each other as well to their parents. It is called variation.


Q4: What are analogous organs?

Answer: The organs that have same functions but different structures and origin are called analogous organs. e.g. the wings of a bat and the wings of an insect are analogous.


Q5: What are homologous organs?

Answer: The organs that have the same structure, origin and components but may be performing different functions are called homologous organs. Eg: hands of a human and the forelimbs of a horse.


Q6: What are vestigial organs?

Monday, 28 September 2015

CBSE Class 10 - Biology - CH8 - How do Organisms Reproduce? (Very Short Q and A)

How do Organisms Reproduce?

CBSE Class 10 - Biology - CH8 - How do Organisms Reproduce? (Very Short Q and A)

Very Short Q & A Based on CBSE Question Papers 


Q1: Name the scientist who used the Latin phrase "Omnis cellula e cellula," means "Every Cell From a Cell"?

Answer: Rudolf Virchow, a German Scientist who emphasised that cell produces cells.


Q2: Does Cell Division play an important role in reproduction?

Answer: Yes. It plays important role in both prokaryotes and eukaryotes. It is important in following two ways:
i.  gives rise to a new organism or daughter cell.
ii. in multicellular prokaryotes, cell division renews and repairs cells that die from wear and tear.


Q3: Give an example cell division occurs in human body for continuity of life?

Answer: Bone marrow continuously produce new blood cells.


Q4: What is the crucial function of cell division?

Answer: To pass genetic material (DNA copy) to offspring cellular apparatus.


Q5: What are the types of cell division? Give examples of each

Answer: There are two types of cell division:
i.  Mitotis : This cell division occurs in most of the cells of the body. Parent cells divides into two (or more) offspring cells passing on identical copies of DNA (genetic material).
ii Meosis: This cell division occurs in cells of reproductive organs (called male and female gametes). Each offspring cell contains half copy of DNA material froms its parent cell. When these male and female gametes fuse together, it gives rise to new organism.


Friday, 24 October 2014

CBSE Class 6-12 - Science - Fathers in Biology

℉α⊥нεяṧ ◎ḟ Ⅴαґḯøü﹩ ℬґαηḉℌ℮ṧ їη ℬїøł☺ℊ¥

Fathers of Various Branches in Biology

Aristotle - Father of Biology
credits: wikipedia
Num.           Branch of Biology Name
1 Father of Biology Aristotle
2 Father of Zoology Aristotle
3 Father of Botany Theophrastus
4 Father of Taxonomy Carl Linnaeus
5 Father of Plant Physiology Stephen Hales
6 Father of Bacteriology Louis Pastuer
7 Father of Microbiology Leeuwenhoek
8 Father of Immunology Edward Jenner
9 Father of Cytology Robert Hooke
10 Father of Mycology Micheli
11 Father of Genetics G J Mendel
12              Father of Experimental Genetics              T. H. Morgan
13 Father of Bryology Johann Hedwig
14 Father of Eugenics Francis Galton
15 Father of Microscopy Marcello Malphigi
16 Father of Bio-diversity E.O. Wilson
17 Father of Medicine Hippocrates
18 Father of modern Anatomy Andreas Vesalius
19 Father of Radiation Genetics H. J. Muller

Saturday, 6 September 2014

CBSE Class 10 - Science - CH 8. CONTROL AND COORDINATION

CONTROL AND COORDINATION

CBSE Class 10 - Science - CH 8. CONTROL AND COORDINATION

MCQs

Q1: The plant hormone which is essential for cell division is:

(a) Auxin
(b) Cytokinin
(c) Ethylene
(d) Gibberellin


Q2: The gap between two neurons is called _____

(a) Synapse
(b) Axon
(c) Synthesise
(d) Dendron


Q3: A potted plant is kept in a room. It starts to bend towards the direction of light. This type of movement is known as

(a) Photographism
(b) Photoperiodism
(c) Phototropism
(d) Photocynism


Q4: Tropic movements are

(a) in response to light
(b) in response to gravity
(c) non-directional
(d) unidirectional