Biology
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Basic Biology (Cell Structure, Plant and Animal Tissues)
SubtopicBasic Biology (Cell Structure, Plant and Animal Tissues) under Biology for Grade 9 ICSE.
Preview questions (no answers)
- 1.
The term used for the entire living matter of a cell, consisting of both the cytoplasm and the nucleus, is:
A.Nucleoplasm
B.Cytoplasm
C.Protoplasm
D.Cell sap
- 2.
Which cell organelle is a network of membrane-bound tubes and sheets involved in the synthesis of lipids?
A.Smooth Endoplasmic Reticulum
B.Rough Endoplasmic Reticulum
C.Golgi Complex
D.Lysosome
- 3.
Which type of leucoplasts are specifically responsible for storing starch in plants like potatoes?
A.Elaioplasts
B.Amyloplasts
C.Aleuroplasts
D.Chromoplasts
- 4.
Which organelle is often referred to as the 'kitchen of the plant cell' because it produces food?
A.Mitochondria
B.Vacuole
C.Chloroplast
D.Ribosome
- 5.
According to the Fluid Mosaic Model, the plasma membrane is primarily composed of a bilayer of:
A.Proteins with embedded lipids
B.Phospholipids with embedded proteins
C.Carbohydrates with embedded lipids
D.Cellulose with embedded proteins
- 6.
Tracheids differ from vessels in that tracheids:
A.Are living cells
B.Have perforated end walls
C.Have pits in their cell walls but no open ends
D.Do not have lignified walls
- 7.
When columnar or cuboidal epithelium cells acquire additional specialization to secrete substances at the epithelial surface, they are called:
A.Ciliated epithelium
B.Glandular epithelium
C.Sensory epithelium
D.Germinal epithelium
- 8.
Which component of the nervous tissue does NOT conduct electrical impulses but provides support, insulation, and nutrients to the neurons?
A.Dendrites
B.Axons
C.Neuroglial cells
D.Synaptic knobs
- 9.
If a plant cell is placed in a 'Hypertonic' solution, what will be the state of the cell, and what is the specific term for this phenomenon?
A.The cell will swell; Turgidity
B.The cell will remain unchanged; Equilibrium
C.The protoplast will shrink away from the cell wall; Plasmolysis
D.The cell wall will burst; Cytolysis
- 10.
Which of the following best describes the function of 'Cuboidal Epithelium' found in the lining of kidney tubules?
A.Protection from abrasion
B.Secretion and absorption
C.Rapid diffusion of oxygen
D.Conduction of nerve impulses
Download the worksheet for Biology - Basic Biology (Cell Structure, Plant and Animal Tissues) to practice offline. It includes additional chapter-level practice questions.
Flowering Plants (Morphology of Flower, Pollination, Fertilization)
SubtopicFlowering Plants (Morphology of Flower, Pollination, Fertilization) under Biology for Grade 9 ICSE.
Preview questions (no answers)
- 1.
The tissue that attaches the ovules to the wall of the ovary is the:
A.Thalamus
B.Placenta
C.Style
D.Connective
- 2.
A flower lacking petals is technically described as:
A.Apetalous
B.Asessile
C.Acarpous
D.Abracteate
- 3.
What is the name of the chemical or mechanical barriers that prevent self-pollination in some flowers?
A.Fertilization
B.Contrivances
C.Inflorescence
D.Placentation
- 4.
The outer integument of the ovule matures into which part of the seed?
A.Tegmen
B.Testa
C.Embryo
D.Radicle
- 5.
In flowers like the Primrose, the existence of different lengths of styles and stamens to prevent self-pollination is called:
A.Dichogamy
B.Herkogamy
C.Heterostyly
D.Self-incompatibility
- 6.
The specific tissue that attaches the ovules to the inner wall of the ovary is the:
A.Funicle
B.Placenta
C.Nucellus
D.Hilum
- 7.
Which floral whorl is considered 'non-essential' or 'accessory' as it is not directly involved in gamete production?
A.Androecium
B.Gynoecium
C.Corolla
D.Carpel
- 8.
In the process of double fertilization, why is it called 'double'?
A.Because two pollen grains fertilize one ovule.
B.Because two polar nuclei fuse together.
C.Because two separate fusion events (syngamy and triple fusion) occur within the embryo sac.
D.Because the zygote divides twice immediately after formation.
- 9.
What is the primary role of the 'Generative Cell' during the growth of the pollen tube?
A.To absorb nutrients from the style.
B.To divide and form two male gametes.
C.To control the direction of the tube growth.
D.To form the wall of the pollen tube.
- 10.
The technical term for a whorl of bracts present at the base of the calyx is:
A.Corolla
B.Epicalyx
C.Androecium
D.Perianth
Download the worksheet for Biology - Flowering Plants (Morphology of Flower, Pollination, Fertilization) to practice offline. It includes additional chapter-level practice questions.
Plant Physiology (Structure of Seed, Germination Types)
SubtopicPlant Physiology (Structure of Seed, Germination Types) under Biology for Grade 9 ICSE.
Preview questions (no answers)
- 1.
Identify the structure that protects the plumule in a maize grain during its passage through the soil.
A.Coleorhiza
B.Coleoptile
C.Aleurone
D.Radicle
- 2.
The germination in Rhizophora is a special case known as:
A.Hypogeal
B.Epigeal
C.Vivipary
D.Dormancy
- 3.
Which of the following is required to activate enzymes during the early stages of germination?
A.Water
B.Light
C.Carbon dioxide
D.Chlorophyll
- 4.
What provides the energy for the initial growth of the embryo in a germinating bean seed?
A.Sunlight
B.Soil minerals
C.Food stored in cotyledons
D.Fertilizers
- 5.
In the internal anatomy of a monocot grain such as maize, the endosperm is not just a uniform mass of starch; it is surrounded by a specialized protein-rich layer. Identify this layer 'X' as shown in the organizational chart below.
A.Scutellum
B.Coleorhiza
C.Aleurone layer
D.Tegmen
- 6.
Which portion of the embryonic axis is the first to elongate during the germination of a bean seed?
A.Epicotyl
B.Hypocotyl
C.Radicle
D.Plumule
- 7.
In which type of plant does the seed develop into a seedling while the fruit is still hanging on the tree?
A.Hydrophytes
B.Mesophytes
C.Mangroves
D.Xerophytes
- 8.
In which plant does the germination occur while the fruit is still attached to the mother plant?
A.Cucumber
B.Coconut
C.Rhizophora
D.Sunflower
- 9.
Which of the following is NOT a reason for the failure of seeds to germinate despite having water and air?
A.The seed is immature
B.The temperature is below
C.The seed coat is permeable to water
D.The seed has lost its viability due to long storage
- 10.
What happens to the rate of respiration in a seed as it undergoes drying (maturation)?
A.It increases to prepare for dormancy
B.It decreases significantly to a near-halt
C.It remains constant
D.It fluctuates based on external humidity
Download the worksheet for Biology - Plant Physiology (Structure of Seed, Germination Types) to practice offline. It includes additional chapter-level practice questions.
Diversity in Living Organisms (Five Kingdom Classification, Bacteria, Fungi)
SubtopicDiversity in Living Organisms (Five Kingdom Classification, Bacteria, Fungi) under Biology for Grade 9 ICSE.
Preview questions (no answers)
- 1.
Bacteria belong to which of the following groups based on cell complexity?
A.Prokaryotes
B.Eukaryotes
C.Multicellular
D.None of these
- 2.
The scientific name of an organism should be written such that:
A.The whole name is capitalized
B.The genus name starts with a capital letter
C.The species name starts with a capital letter
D.No part is capitalized
- 3.
Which of the following kingdoms is correctly matched with its cell type?
A.Monera - Eukaryotic
B.Protista - Prokaryotic
C.Fungi - Eukaryotic
D.Animalia - Prokaryotic
- 4.
Which kingdom includes slime moulds?
A.Monera
B.Protista
C.Fungi
D.Plantae
- 5.
Classification based on the evolutionary history of organisms is known as:
A.Artificial system
B.Natural system
C.Phylogenetic system
D.Binomial system
- 6.
Which of the following organisms belongs to Kingdom Monera and is capable of fixing atmospheric nitrogen in root nodules of leguminous plants?
A.B.C.D. - 7.
The fungal disease 'Athlete's foot' is caused by a member of Kingdom:
A.Monera
B.Protista
C.Fungi
D.Animalia
- 8.
The cell membrane of certain Archaebacteria allows them to survive at extremely high temperatures (thermophiles) because it contains:
A.Cholesterol for stability
B.Monolayers of long-chain hydrocarbons with ether links
C.Double layers of peptidoglycan
D.High concentrations of calcium salts
- 9.
Yeast is an exception in the Kingdom Fungi because it is:
A.Autotrophic
B.Unicellular
C.Prokaryotic
D.Lacking a cell wall
- 10.
Which of the following represents the correct sequence of classification from the least inclusive to the most inclusive category?
A.Species < Genus < Family < Order
B.Order < Family < Genus < Species
C.Phylum < Class < Order < Family
D.Kingdom < Phylum < Class < Order
Download the worksheet for Biology - Diversity in Living Organisms (Five Kingdom Classification, Bacteria, Fungi) to practice offline. It includes additional chapter-level practice questions.
Human Anatomy and Physiology (Nutrition, Digestive System, Skeleton, Movement, Skin, Respiratory System)
SubtopicHuman Anatomy and Physiology (Nutrition, Digestive System, Skeleton, Movement, Skin, Respiratory System) under Biology for Grade 9 ICSE.
Preview questions (no answers)
- 1.
Which vitamin deficiency causes rickets in children, characterized by soft and weak bones?
A.Vitamin A
B.Vitamin B
C.Vitamin C
D.Vitamin D
- 2.
The shoulder blade is anatomically known as the:
A.Clavicle
B.Scapula
C.Sternum
D.Patella
- 3.
Which of the following is NOT a part of the small intestine?
A.Duodenum
B.Jejunum
C.Ileum
D.Caecum
- 4.
What happens to the rib cage during exhalation?
A.It moves upwards and outwards
B.It moves downwards and inwards
C.It expands in volume
D.It remains in the same position
- 5.
Which of the following joints allows the movement of a bone in only one plane, similar to the movement of a door?
A.Pivot joint
B.Gliding joint
C.Hinge joint
D.Ball and socket joint
- 6.
In the process of digestion, which enzyme is responsible for converting starch into maltose in the mouth?
A.Pepsin
B.Salivary Amylase (Ptyalin)
C.Trypsin
D.Lipase
- 7.
The 'Dermis' of the skin is thicker than the epidermis and is composed primarily of:
A.Dead cornified cells
B.Connective tissue with collagen and elastin fibers
C.Only epithelial cells
D.Single layer of Malpighian cells
- 8.
Which of the following vitamins is synthesized in the human skin through the action of ultraviolet radiation on 7-dehydrocholesterol?
A.Vitamin A
B.Vitamin B
C.Vitamin C
D.Vitamin D
- 9.
In the skeletal system, 'Sutures' are examples of which type of joint?
A.Freely movable synovial joints
B.Slightly movable cartilaginous joints
C.Immovable fibrous joints
D.Pivot joints
- 10.
Identify the correct anatomical sequence of air passage during inhalation in humans.
A.Nostrils -> Larynx -> Pharynx -> Trachea -> Bronchioles -> Alveoli
B.Nostrils -> Pharynx -> Larynx -> Trachea -> Bronchi -> Alveoli
C.Nostrils -> Trachea -> Pharynx -> Larynx -> Bronchi -> Alveoli
D.Nostrils -> Pharynx -> Trachea -> Larynx -> Bronchioles -> Alveoli
Download the worksheet for Biology - Human Anatomy and Physiology (Nutrition, Digestive System, Skeleton, Movement, Skin, Respiratory System) to practice offline. It includes additional chapter-level practice questions.
Health and Hygiene (Common Diseases, Modes of Transmission, First Aid)
SubtopicHealth and Hygiene (Common Diseases, Modes of Transmission, First Aid) under Biology for Grade 9 ICSE.
Preview questions (no answers)
- 1.
Which of the following can lead to the spread of Hepatitis A?
A.Bite of a mad dog
B.Consumption of contaminated food or water
C.Iron deficiency in diet
D.Inhaling dust particles
- 2.
Inflammation of the membranes surrounding the brain and spinal cord is known as:
A.Bronchitis
B.Meningitis
C.Arthritis
D.Gastritis
- 3.
Which of the following is a symptom of Marasmus?
A.Swelling of the body (oedema)
B.Extreme thinning of limbs and loss of body weight
C.Bleeding into joints
D.Blueing of skin
- 4.
World Health Day is celebrated every year on:
A.June 5
B.December 1
C.April 7
D.September 16
- 5.
What is the main goal of providing a 'Sling' during first aid for an arm injury?
A.To stop the bleeding from a deep cut
B.To support the weight of the injured limb and prevent movement
C.To apply pressure to a burn
D.To keep the arm warm and improve circulation
- 6.
Which mode of transmission is responsible for the spread of ?
A.Contaminated water
B.Droplet infection through coughing or sneezing
C.Bite of an infected flea
D.Sexual contact
- 7.
Which of the following is a characteristic of a 'disinfectant' but not an 'antiseptic'?
A.It is used to kill germs
B.It is applied to wounds on the skin
C.It is too strong to be used on living tissues
D.It is a chemical substance
- 8.
In first aid for a bee sting, why is it recommended to scrape the stinger off with a flat object rather than pulling it out with tweezers?
A.Tweezers may break the stinger inside the skin
B.Squeezing the stinger with tweezers can inject more venom into the wound
C.Scraping is less painful for the patient
D.Tweezers are often not sterile
- 9.
Which of the following is true about the transmission of Hepatitis A?
A.It is primarily spread through contaminated blood transfusions
B.It is an airborne infection
C.It is transmitted via the faeco-oral route
D.It is a sexually transmitted disease
- 10.
What is the primary physiological cause of death in untreated Cholera patients?
A.Multi-organ failure due to bacterial toxins
B.Hypovolemic shock due to extreme dehydration
C.Respiratory failure due to lung congestion
D.Internal bleeding from the intestinal wall
Download the worksheet for Biology - Health and Hygiene (Common Diseases, Modes of Transmission, First Aid) to practice offline. It includes additional chapter-level practice questions.
Waste Generation and Management (Sources of Waste, Methods of Safe Disposal)
SubtopicWaste Generation and Management (Sources of Waste, Methods of Safe Disposal) under Biology for Grade 9 ICSE.
Preview questions (no answers)
- 1.
Which of these is a way to manage municipal solid waste effectively?
A.Dumping it in the ocean
B.Segregation and Recycling
C.Leaving it on the roadside
D.Burning it in residential areas
- 2.
Which material is considered environmentally friendly for making carry bags?
A.Plastic
B.Jute
C.Polystyrene
D.Synthetic fiber
- 3.
Which of the following is an example of agricultural waste?
A.Pesticide containers
B.Old televisions
C.Broken glass
D.Cardboard
- 4.
Organic waste can be converted into which of the following through composting?
A.Plastic
B.Manure
C.Glass
D.Metal
- 5.
The term 'Biogas' is associated with which waste management process?
A.Incineration of plastic
B.Anaerobic digestion of organic waste
C.Electrolysis of industrial wastewater
D.Physical screening of municipal waste
- 6.
Which of the following is a 'biodegradable' pollutant?
A.DDT
B.Sewage
C.Glass
D.Aluminum cans
- 7.
What is the primary environmental hazard associated with the improper disposal of used engine oil?
A.It causes depletion of the ozone layer
B.It can contaminate groundwater and coat the surface of water bodies, blocking oxygen
C.It increases the concentration of in the atmosphere directly
D.It leads to the growth of more trees
- 8.
Which of the following describes the 'Life Cycle Assessment' (LCA) of a product?
A.A test to see how long a product lasts before breaking
B.An evaluation of the environmental impact of a product from raw material extraction to final disposal
C.The calculation of the profit margin over the life of a product
D.A method to determine the biological age of the materials used
- 9.
In the context of the environment, what is a 'Legacy Waste'?
A.Waste handed down from one generation to another as heirlooms
B.Large volumes of historical waste that have accumulated in landfills over decades
C.Waste generated by the software industry (old code)
D.Biodegradable waste that takes more than 10 years to decompose
- 10.
What is 'Bagasse' and how is it utilized in waste management?
A.It is waste from the leather industry used for glue
B.It is the fibrous residue of sugarcane used as fuel in boilers
C.It is a byproduct of oil refineries used for paving roads
D.It is a toxic sludge from paper mills that must be buried
Download the worksheet for Biology - Waste Generation and Management (Sources of Waste, Methods of Safe Disposal) to practice offline. It includes additional chapter-level practice questions.