SUMMER HOLIDAY HOMEWORK
Session 2013-14
D-II, Vasant Kunj, New Delhi - 110070
Name : _____________________
S.No. : 1
Date : _______/ ______/ _______
Class : IX
Subject: Science
a)
b)
c)
d)
e)
GENERAL INSTRUCTIONS:
All questions are compulsory.
Diagrams should be neatly drawn and labeled.
Questions should be attempted in a sequential manner and a line to be drawn after each question.
Present your work neatly.
Holiday homework sheet should be stapled or stuck to the notebook.
Q1. Write true if the statement is true or false if the statement is false.
_____ 1. An organ is a structure made of only one type of tissue.
_____ 2. A tissue is made of a group of cells that have the same job.
_____ 3. Instead of having a plasma membrane, plant cells have a cell wall.
_____ 4. Plant cells are prokaryotic.
_____ 5. The main function of plastids is to maintain pressure against the cell wall.
_____ 6. A plant’s central vacuole is typically large.
_____ 7. The plant cell wall is located just inside the plant’s plasma membrane.
_____ 8. Plant cells walls can contain both cellulose and lignin.
_____ 9. Some types of parenchymal cells are photosynthetic cells.
_____ 10. Cell walls of sclerenchyma are very thick.
_____ 11. Xylem and phloem are types of dermal tissue.
_____ 12. The plant cuticle protects and waterproofs the above-ground parts of the plant.
_____ 13. Most plants grow only during a very short period during their lifetime.
_____ 14. Cell division decreases the number of cells in a plant.
_____ 15. Meristem is made of differentiated cells.
Q2. Read these passages from the text and answer the questions that follow.
Plant Tissues
All three types of plant cells are found in most plant tissues. Three major types of plant
tissues are dermal,ground, and vascular tissues.
Dermal Tissue
Dermal tissue covers the outside of a plant in a single layer of cells called the epidermis. You
can think of the epidermis as the plant’s skin. It mediates most of the interactions between a
plant and its environment. Epidermal cells secrete a waxy substance called cuticle, which
coats, waterproofs, and protects the aboveground parts of plant. Cuticle helps prevent water
loss, abrasions, infections, and damage from toxins.
Ground Tissue
Ground tissue makes up much of the interior of a plant and carries out basic metabolic
functions. Ground tissue in stems provides support and may store food or water. Ground
tissues in roots may also store food.
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Vascular Tissue
Vascular tissue runs through the ground tissue inside a plant. It consists of xylem and
phloem, which
transport fluids. Xylem and phloem are packaged together in bundles.
Questions
1. What is a plant’s epidermis? What is its function?
2. Describe the functions of ground tissue.
3. Why are xylem and phloem bundled together?
4. Do you think that all plants have these three types of tissue? Why or why not?
Q3. Fill in the blank with the appropriate term.
1. The __________ contains chlorophyll.
2. A membrane-bound organelle containing pigments other than chlorophyll is the __________.
3. The __________ contains dividing, undifferentiated cells.
4. __________ consists of loosely packed cells with thin cell walls.
5. The tissue type that makes up most of the plant’s interior is __________.
6. The epidermis makes up the __________.
7. The __________ provides support for individual plant cells and for the entire plant.
8. The __________ contains xylem and phloem.
9. The __________ contains cells with thick, lignified cell walls.
10. The water-filled, membrane-bound __________ occupies the majority of space inside a mature
plant cell.
11. __________ helps support the plant and provides wind-resistance; its cells have irregularly
thickened cell walls.
12. The plant’s __________ protects the plant against water loss, toxins, abrasions, and infections.
Q4. Label the following diagrams of Red Blood Cells and Plant Cells as being examples of cells
contained in Isotonic, Hypertonic and Hypotonic solutions.
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Q5. CHOOSE THE CORRECT OPTION
Which of the following events is NOT an example of diffusion?
A
B
C
D
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While still some distance away, the smell of durians from a nearby fruit stall becomes very
evident.
A pail of water is toppled and water got spilled across the floor, flowing from one end to
another.
The exchange of oxygen and carbon dioxide in the lungs’ air sacs as a person respire.
A blue copper(II) sulfate crystal dissolves slowly when placed in a beaker of water without
stirring, giving a uniformly light blue solution.
Which of the following is true about diffusion and osmosis?
A
B
C
D
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Both diffusion and osmosis requires energy taken in for net movement of particles
Both diffusion and osmosis refers to movement of water molecules.
Both diffusion and osmosis involves movement of particles down a concentration gradient.
Both diffusion and osmosis only takes place when particles are in liquid state.
A root hair cell is able to absorb water through _________ because the cell sap of the root hair
has a ____________ water concentration than the water in the soil.
A
C
osmosis; higher
osmosis; lower
B
D
diffusion; higher
diffusion; lower
4. The diagram below shows an experimental set-up to investigate osmosis
In order for X to rise to the highest level in
glass tube, what could Liquid X and Y be?
A
B
C
D
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Liquid X
Concentrated salt
solution
Dilute salt solution
Concentrated salt
solution
Water
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Liquid Y
Dilute salt solution
Concentrated salt
solution
Water
Concentrated salt
solution
the
5. Pictures A and B both show red blood cells.
A
B
Given the red blood cells in Picture A was obtained from an isotonic solution, what can you deduce
about the solution from which red blood cells in Picture B is obtained?
(i) How would you describe the appearance of the red blood cells in Picture B?
(ii) Predict and explain what will happen to red blood cells from Picture A if it was placed in
pure water.
Q6. How the Animal Body is Organized
All animals consist of cells, which are organized in a hierarchy, levels of increasing complexity.
Any group of similar cells that perform the same specific function is called a
_______________________. An _________________ is a structure made of two or more types
of tissue that work together to do a specific task. An _____________ _________________
consists of one or more organs that work together to perform a body function.
Q7. Match each general tissue category to the appropriate feature.
A. connective tissue
B. epithelium
1) ____ lines cavities, tubes, covers
body
2) ____ conducts electrical impulses
3) ____ has contractile properties
4) ____ binds and connects body parts
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C. nervous tissue
D. muscle
5) ____ found mostly as layers
6) ____ many glands, such as sweat glands
and salivary glands, are composed of this
tissue
7) ____ there are three types: skeletal,
cardiac and smooth
8) ____ blood and cartilage are examples of
this tissue type
PROBLEM SOLVING ASSESMENT QUESTION:
Q1. Nucleus, the genetic material containing rounded body in each cell, was first discovered in
1831 by
A.Robert Hooke
B. Robert Brown
C. Rudolf Virchow
D.Theodore Schwann
Q2 If you're a fitness walker, there is no need for a commute to a health club. Your
neighborhood can be your health club. You don't need a lot of fancy equipment to get a good
workout either. All you need is a well-designed pair of athletic shoes.
This paragraph best supports the statement that
A.fitness walking is a better form of exercise than weight lifting.
B. a membership in a health club is a poor investment.
C. walking outdoors provides a better workout than walking indoors.
D.fitness walking is a convenient and valuable form of exercise.
E. poorly designed athletic shoes can cause major foot injuries.
Q3. Today's high school students spend too much time thinking about trivial and distracting
matters such as fashion. Additionally, they often dress inappropriately on school grounds.
Rather than spending time writing another detailed dress policy, we should make school
uniforms mandatory. If students were required to wear uniforms, it would increase a sense of
community and harmony in our schools and it would instill a sense of discipline in our students.
Another positive effect would be that teachers and administrators would no longer have to act
as clothing police, freeing them up to focus on more important issues.
This paragraph best supports the statement that
A.inappropriate clothing leads to failing grades.
B. students who wear school uniforms get into better colleges.
C. teachers and administrators spend at least 25% of their time enforcing the dress code.
D.students are not interested in being part of a community
E. school uniforms should be compulsory for high school students.
Q4.Sara lives in a large city on the East Coast. Her younger cousin Marlee lives in the Mid-west
in a small town with fewer than 1,000 residents. Marlee has visited Sara several times during
the past five years. In the same period of time, Sara has visited Marlee only once.
A.Marlee likes Sara better than Sara likes Marlee.
B. Sara thinks small towns are boring.
C. Sara is older than Marlee.
D.Marlee wants to move to the East Coast.
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Statements:
1. There is sharp decline in the production of oil seeds this year.
2. The Government has decided to increase the import quantum of edible oil.
A.Statement I is the cause and statement II is its effect
B. Statement II is the cause and statement I is its effect
C. Both the statements I and II are independent causes
D.Both the statements I and II are effects of independent causes
Both the statements I and II are effects of some common cause
E.
Q5. The school principal has received complaints from parents about bullying in the school yard
during recess. He wants to investigate and end this situation as soon as possible, so he has
asked the recess aides to watch closely. Which situation should the recess aides report to the
principal?
A.A girl is sitting glumly on a bench reading a book and not interacting with her peers.
B. Four girls are surrounding another girl and seem to have possession of her backpack.
Two boys are playing a one-on-one game of basketball and are arguing over the last basket
C.
scored.
Three boys are huddled over a handheld video game, which isn't supposed to be on school
D.
grounds.
Q6. Look at this series: 3, 4, 7, 8, 11, 12, ... What number should come next?
A.7
B. 10
C. 14
D.15
Q7. The future of women in India is quite bright and let us hope that they will justify their
abilities by rising to the occasion. Napoleon was right when he declared that by educating the
women we can educate the whole nation. Because a country can never rise without the
contribution of 50% of their population.
The passage best supports the statement that:
A.India is striving hard for the emancipation of women.
B. all women should be well educated.
C. a nation can progress only when women are given equal rights and opportunities as men.
women ought to be imparted full freedom to prove their worth and contribute to the
D.
progress of the nation.
Q8. Movement of cell against concentration gradient is called
A.osmosis
B. active transport
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C. diffusion
D.passive transport
Q9. One of the following is not a function of bones.
A.Place for muscle attachment
B. Protection of vital organs
C. Secretion of hormones for calcium regulation in blood and bones
D.Production of blood corpuscles
Q10. Other than spreading malaria, anopheles mosquitoes are also vectors of
A.dengue fever
B. filariasis
C. encephalitis
D.yellow fever
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