Free now and forever through Sabaq.pk website
For Schools
About Us
Media
Success
Sign In
Free now and forever thru Sabaq.pk website
Biology | Class 12
Sindh
Class 12
Biology (
Total Videos: 420
)
Preference
All Chapters
Chapter 1: Homeostasis
Chapter 2: Support And Movement
Chapter 3: Coordination and Control
Chapter 4: Reproduction
Chapter 5: Growth And Development
Chapter 6: Chromosomes And DNA
Chapter 7: Cell Cycle
Chapter 8: Variation And Genetics
Chapter 9: Biotechnology
Chapter 10: Evolution
Chapter 11: Ecosystem
Chapter 12: Some Major Ecosystems
Chapter 13: Man And His Environment
Show Content
Select a chapter above and press 'Show Content'. Click a video topic below to view.
Chapter 1 Homeostasis (
42 videos
)
  (
Practice Test
)
1.1: Homeostasis And Its Various Aspects (
Practice Test
)
Osmoregulation, Thermoregulation and Excretion
29601 views
Concept of Feedback
8080 views
1.2: Osmoregulation (
Practice Test
)
Balance of Water and Solutes in Body
2030 views
Hydrophytes and Halophytes
13556 views
Osmoregulation in Animals
17204 views
Osmoregulation in Different Environments
12639 views
1.3: Excretion (
Practice Test
)
Excretion in Plants
15550 views
Excretion in Animals
9564 views
Nature of Excretory Products in Relation to Habitats
7312 views
Excretory Organ in Planaria
10704 views
Excretory Organ in Earthworm
12112 views
Excretory Organ in Cockroach
12335 views
Excretory System
7212 views
Excretory Organs, Liver
8840 views
Excretory Organs in Vertebrates, Nephrons, Kidney
6528 views
Urinary System
9245 views
Structure of Kidney
49113 views
Nephron
11277 views
Blood Circulation to Nephron
6650 views
Types of Nephron
7109 views
Role of Kidney
27826 views
Function of Kidney
9917 views
Urea Formation, Kidney Filtration
3968 views
Concentration of Excretory Product
4743 views
Effects of Hormones on The Working of Kidney
4107 views
Kidney as Osmoregulatory Organ
12046 views
1.4: Kidney Problems And Their Remedies (
Practice Test
)
Formation of Stones in Kidney
4168 views
Lithotripsy
3666 views
Renal Failure
13435 views
Peritoneal Dialysis
20631 views
Kidney Transplant
5706 views
Treatment of Malfunctioned Kidneys
2333 views
1.5: Thermoregulation (
Practice Test
)
Adaptations in Plants to High Temperature
1012 views
Adaptations in Plants to Low Temperature
920 views
Temperature Classification of Animals
6239 views
Classification of Animals on the Basis of Heat Production
Regulation of Heat Exchange Between Animals and Environment
4544 views
1.6: Thermoregulation In Mammals (Man) (
Practice Test
)
Regulatory Strategies
3674 views
Thermostat Function and Feedback Controls in Human and Fever
3770 views
Pyrexia and Pyrogens
3910 views
The Structure and Role of Skin
178 views
Skin and Lungs
5287 views
Chapter 2 Support And Movement (
71 videos
)
  (
Practice Test
)
2.1: Support In Plants (
Practice Test
)
Support, Movement and Locomotion
5709 views
Support in Plants
Parenchyma Tissues
5296 views
Collenchyma Tissues
14321 views
Sclerenchyma Tissues
8400 views
Secondary Growth
6209 views
Heart Sap Wood
2920 views
2.2: Movement In Plants (
Practice Test
)
Types of Movements
4799 views
Tactic Movements
6942 views
Thermotaxis and Chemotaxis
2471 views
Turgor Movements
5076 views
Growth Movements
3793 views
Tropic Movements
5322 views
More on Tropic Movements
1287 views
Geotropism and Hydrotropism
4336 views
Nastic Movement
4198 views
Types of Nastic Movement
6304 views
More on Nastic Movements
1197 views
2.3: Role of Growth Substances In Plant Movement (
Practice Test
)
Role of Plant Growth Substance in Plant Movements
2993 views
2.4: Support And Locomotion In Animals
Support and Locomotion in Animals
3182 views
2.5: Skeletal System (
Practice Test
)
Hydrostatic Skeleton
9873 views
Exoskeleton
6196 views
Ecdysis
3621 views
Endoskeleton
3406 views
Human Skeleton, Axial Skeleton
38474 views
Skull
3485 views
Ribs
2583 views
Vertebral Column
9 views
Appendicular Skeleton
3189 views
Pelvic Girdle
3262 views
Hind Limb
Function of Skeletal System
2927 views
Bones
10019 views
Cartilages
6653 views
More on Joints
3205 views
Types of Joints
11695 views
Synovial Joint
4692 views
Genetic Causes
3619 views
Hormonal Causes of Skeleton Deformities
3743 views
Nutritional Causes
1469 views
Disc-Slip
6459 views
Spondylosis
3761 views
Sciatica
4201 views
Repair of Broken Bones
8478 views
2.6: Muscular System (
Practice Test
)
Muscular System
4186 views
Smooth and Cardiac Muscles
4437 views
Skeletal Muscles, Skeletal Muscle Fibre
12189 views
More on Skeletal Muscles, Skeletal Muscle Fibre
8763 views
Ultrastructure of Myofilament
6912 views
Sliding Filament Model
8807 views
How Bridges are Controlled?
5968 views
Controlling the Actin-Myosin Interaction by Ca++ Ions
11088 views
Energy for Muscle Contraction
6576 views
Tetany and Cramp
14328 views
2.7: Arrangement of Skeletal Muscles For Skeletal Movement (
Practice Test
)
Origin, Insertion, Belly, Ligaments and Tendons
3142 views
Muscles and Movements
7571 views
Arrangement of Skeletal Muscles for Skeletal Movement
4024 views
2.8: Locomotion (
Practice Test
)
Locomotion In Amoeba
7958 views
Locomotion In Euglena
9644 views
More on Locomotion in Euglena and Amoeba
3005 views
Locomotion In Paramecium
9612 views
More on Locomotion in Paramecium
5511 views
Locomotion in Jelly Fish and Earthworm
7744 views
Locomotion in Star Fish and Snail
9389 views
Locomotion in Cockroach
6762 views
Locomotion in Fish
8395 views
Locomotion in Amphibian
4649 views
Locomotion in Reptiles
4041 views
Locomotion in Air
4142 views
Locomotion in Mammals
3630 views
2.9: Evolution of Skeleto-Muscular System
Evolutionary Changes in The Arrangement of Bones
Chapter 3 Coordination and Control (
50 videos
)
  (
Practice Test
)
3.1: Control In Plants (
Practice Test
)
Stimuli, Receptors, Effectors, Response
16832 views
Control Through Hormones in Plants
4224 views
Types of Movements
4799 views
Biological Clocks and Circadian Rhythms
11435 views
Photoperiodism
1909 views
Defense Against Pathogens in Plants
2811 views
3.2: Plant Hormones (
Practice Test
)
Auxins and Gibberellins
8872 views
Cytokinin, Abscisic Acid and Ethylene
4923 views
3.3: Co-ordination And Control In Animals (
Practice Test
)
Types of Coordination
5018 views
Coordinators, Effectors and Response
5570 views
Nerve cell or Neuron
14832 views
Nerve Types
6815 views
Neuron Types
10302 views
3.4: Nerve Impulse (
Practice Test
)
Nerve Impulse
12246 views
Synapse
11029 views
Reflex Action
10745 views
3.5: Evolution of Nervous System (
Practice Test
)
Evolution of Nervous System
5548 views
Nervous System of Hydra
5490 views
Nervous System of Planaria
2454 views
3.6: Human Nervous System (
Practice Test
)
The Divisions of Brain, Forebrain
10596 views
The Divisions of Brain, Forebrain
38557 views
Midbrain and Hindbrain
11262 views
Spinal Cord
13955 views
Peripheral Nervous System
29672 views
More on Peripheral Nervous System
2975 views
3.7: Receptors (
Practice Test
)
Receptors and Its Types
2045 views
Working of Sensory Receptors With Special Reference to Skin
4786 views
3.8: Effects of Drugs On Coordination (
Practice Test
)
Effects of Drugs On Nervous Coordination
Parkinson's Disease
2833 views
Alzheimer's Disease
3664 views
Epilepsy
2577 views
3.9: Chemical Coordination (
Practice Test
)
Important endocrine gland
9123 views
Mode of Hormone Action
4163 views
Feedback Mechanism
11601 views
Pituitary Gland
7291 views
Pituitary's Median Lobe and Posterior Lobe
4164 views
Thyroid Gland
10441 views
Parathyroid
7905 views
Pancreas
10728 views
Adrenal Gland
9392 views
Gonads
8639 views
Comparison of Nervous Coordination and Chemical Coordination
3.10: Animal Behavior (
Practice Test
)
Innate Behaviour
11098 views
More on Non-Orientation Behaviour
3243 views
Non - Orientation Behaviour
5102 views
Learning
13699 views
More on Learning
6450 views
Social Behaviour
5783 views
More on Social Behaviour
4261 views
Biological Clocks and Circadian Rhythms
11435 views
Chapter 4 Reproduction (
50 videos
)
  (
Practice Test
)
4.1: Asexual Reproduction (
Practice Test
)
Reproduction, Asexual and Sexual reproduction
11247 views
Reproduction in Plants
7625 views
Artificial Methods of Asexual Reproduction
3768 views
Tissue Culturing and Genetic Engineering
694 views
Advantages and Disadvantages of Tissue Culture or Cloning
4.2: Sexual Reproduction (
Practice Test
)
Different Types of Sexual Reproduction in Lower and Higher Plants
More on Vascular Plants - Successful Land Plants
102 views
Sexual Reproduction in Flowering Plants, The Flower
1046 views
Structure of Ovules
2544 views
Structure of Pollen Grain
2060 views
Life Cycle of Flowering Plant
20326 views
Pollination
4691 views
Maize Pollination and Fertilization
2521 views
Formation of Seed And Fruit
2487 views
Development and Structure of Seed
17044 views
Structure of Mature Seed
2747 views
4.3: Inflorescence (
Practice Test
)
Inflorescence and Its Major Types
7929 views
Racemose Inflorescence
6290 views
Cymose Inflorescence
8167 views
4.4: Sporophyte And Gametophyte Generations Alternate In The Life Cycle of Plant
Sporophyte and Gametophyte Generations Alternate in The Life Cycle of Plant
4.5: Seed Dormancy (
Practice Test
)
Seed Dormancy
23099 views
Fruit Ripening
4605 views
Parthenocarpy
16333 views
4.6: Transition To Flowering Stage (
Practice Test
)
Germination of Seed
6453 views
4.7: Vernalization (
Practice Test
)
Vernalization
3429 views
4.8: Photoperiodism (
Practice Test
)
Photoperiodism
1909 views
Mechanism of Photoperiodism
1342 views
In Vitro is Fertilization of Plant Egg And Its Importance
5306 views
4.9: Asexual Reproduction (
Practice Test
)
Budding
1392 views
Regeneration and Parthenogenesis
3872 views
Animal Cloning
3382 views
Identical Twins
4.10: Sexual Reproduction (
Practice Test
)
Sexual Reproduction
518 views
Gametogenesis
9695 views
Fertilization
2049 views
Mating and Fertilization
3678 views
Oviparity and Viviparity
4.11: Reproductive Organs Of A Human Male (
Practice Test
)
Male Reproductive System
15700 views
More on Structure of Male Reproductive System
6253 views
Function of Male Reproductive System
5346 views
4.12: Reproductive Organs Of A Human Female (
Practice Test
)
Female Reproductive System
15779 views
4.13: Female Reproductive Cycles (
Practice Test
)
Function of Female Reproductive System
8878 views
Menstrual Cycle
14343 views
4.14: Hormonal Control of Reproductive Cycles (
Practice Test
)
Hormonal Control of Reproductive Cycles
6842 views
4.15: Conception And Pregnancy
The Placenta
4.16: Birth
Labour Process, Clamping And Cutting of Umbilical Cord
Lactation/Nursing
4.17: Test Tube Babies
Treatment of Infertility (In Vitro Fertilization)
4.18: Sexually Transmitted Diseases (
Practice Test
)
Gonorrhea and Syphilis
AIDS, A Sexually Transmitted Disease
7203 views
Chapter 5 Growth And Development (
19 videos
)
  (
Practice Test
)
5.1: Growth and Development In Plant (
Practice Test
)
From Seed to Seedling
3766 views
Apical Meristems, Intercalary Meristems and Lateral Meristems
4073 views
Phases of Growth
5958 views
Secondary Growth
6209 views
5.2: Conditions For Growth
Condition of Growth
3860 views
5.3: Growth Correlations
Growth Correlation in Plants
5.4: Growth And Development In Animals (
Practice Test
)
Growth and Development in Animals
6203 views
Development of Chick (Fertilization and Incubation)
18342 views
Cleavage, Morula
11172 views
Blastula and Gastrulation
23834 views
Notochord and Mesoderm Formation
25204 views
Neurulation
14420 views
5.5: Cell Differentiation And Its Mechanism (
Practice Test
)
Cell Differentiation and Its Mechanism
9336 views
Hans Spemann's Experiment
8604 views
5.6: Role Of Nucleus In Development
Role of Nucleus in Development
8441 views
5.7: Role Of Cytoplasm In Development
Role of Cytoplasm in Development
8490 views
5.8: Aging
Signs And Symptoms of Aging
5.9: Regeneration (
Practice Test
)
Regeneration and Parthenogenesis
3872 views
5.10: Abnormal Development (
Practice Test
)
Abnormal Development
2295 views
Chapter 6 Chromosomes And DNA (
33 videos
)
  (
Practice Test
)
6.1: Types of Chromosomes (
Practice Test
)
Organisms Have Number of Chromosomes Specific to Their Species
4415 views
Gene and Genome, Chromosome, Chromatin
11553 views
Types of Chromosomes
14095 views
6.2: Chemical Composition of Chromosomes (
Practice Test
)
Composition of Chromosome
25284 views
Gene and Genome, Chromosome, Chromatin
11553 views
6.3: Chromosomes As Carriers Of Genes
Gamete - A Vehicle of Inheritance
4638 views
6.4: Chromosomal Theory Of Heredity (
Practice Test
)
The Chromosomal Theory of Inheritance
27027 views
DNA as Hereditary Material, Vehicle
13921 views
More on DNA as Hereditary Material, Vehicle
10170 views
Mononucleotide
7630 views
Nucleotide and Polynucleotide
9057 views
How Does the DNA of Chromosome work?
7297 views
Significance of Base Sequence
2304 views
Watson-Crick Model of DNA
65841 views
Replication of DNA
16059 views
Types of Replication
5830 views
The Meselson-Stahl Experiment
13174 views
6.5: Genes--- The Unit Of Hereditary Information (
Practice Test
)
Genes and Enzymes
2311 views
Experiment of Beadle and Tatum on Neurospora
17395 views
Types of RNA
13828 views
Transcription
18325 views
Advance Transcription
4411 views
More on Transcription
9405 views
Post-Transcriptional Modification of mRNA
6465 views
Translation
15338 views
Translation, Protein Synthesis
6024 views
More on Translation, Protein Synthesis
3969 views
Genetic Code
5380 views
6.6: Mutation (
Practice Test
)
Importance of Mutation
2822 views
Chromosomal Mutations
5795 views
Mutations
6593 views
Chromosomal Mutations (Turner Syndrome)
4338 views
Point Mutation/Gene Mutations
2870 views
Chapter 7 Cell Cycle (
17 videos
)
  (
Practice Test
)
7.1: Interphase And Cell Division (
Practice Test
)
Cell Cycle
20785 views
Amitotic Cell Division In Prokaryotes
3575 views
7.2: Cell Death (Necrosis and Apoptosis)
Apoptosis and Necrosis
2655 views
7.3: Mitosis (
Practice Test
)
Mitosis, Prophase
30609 views
Anaphase, Telophase of Mitosis
16891 views
More on Mitosis, Cytokinesis
10975 views
Significance of Mitosis
10862 views
Cancer (Uncontrolled Cell Division)
3827 views
Cancer Types
1709 views
7.4: Meiosis (
Practice Test
)
Metaphase I, Anaphase I and Telophase I
15853 views
Meiosis-I, Prophase I
13659 views
Meiosis I (Prophase I)
8802 views
Meiosis-II
7798 views
Significance of Meiosis
8647 views
Importance of Meiosis
2663 views
Chromosomal Mutations
5795 views
Chromosomal Mutations (Turner Syndrome)
4338 views
Chapter 8 Variation And Genetics (
26 videos
)
  (
Practice Test
)
8.1: Genes And Alleles (
Practice Test
)
Genes, Locus, Alleles, Phenotype, Genotype
22120 views
Gene Pool
10442 views
8.2: Review of Mendel's Laws of Inheritance (
Practice Test
)
Mendel’s Law of Segregation
28037 views
Mendel’s Law of Independent Assortment
19410 views
Mendel's Interpretation
5460 views
Punnet Square, Test Cross
4894 views
8.3: Incomplete Dominance And Codominance (
Practice Test
)
Incomplete Dominance
8390 views
Complete Dominance
5375 views
8.4: Multiple Alleles (
Practice Test
)
Multiple Alleles
7716 views
Epistasis
9802 views
Wheat Grain Colour
4859 views
Human Skin Colour
3448 views
Pleiotropy
5738 views
8.5: Linkage And Crossing Over (
Practice Test
)
Genetic Recombination
7696 views
Patterns of Sex Determination
3770 views
8.6: Sex Determination And Sex Linkage (
Practice Test
)
Sex Linkage
1374 views
Sex Determination, Chromosome in Drosophila
5522 views
Sex Linkage in Drosophila
12208 views
Comparison of Chromosomal Determination of Sex Between Drosophila and Humans
4292 views
Chromosome in Man
2013 views
Sex-Linkage in Human
3958 views
Sex Linked Inheritance, Colour Blindness
8494 views
Haemophilia
4161 views
More on Haemophilia
2149 views
8.7: Diabetes Mellitus (
Practice Test
)
Diabetes Mellitus and Its Genetic Basis
2732 views
Diabetes Mellitus Type II and Its Genetic Basis
1646 views
Chapter 9 Biotechnology (
25 videos
)
  (
Practice Test
)
9.1: Genetic Engineering (
Practice Test
)
Biotechnology, The Genetic Engineering
11062 views
Scope and Importance of Biotechnology
6326 views
Genetic Engineering
190 views
Using Bacteria in Genetic Engineering
27401 views
Recombinant DNA Technology Depends on Enzymes
2943 views
Molecular Scissor: Restriction Endonucleases
5696 views
Molecular Carrier: Vector
5827 views
DNA Ligase and Expression System
2946 views
Application of Genetically Modified Bacteria
2437 views
Transgenic Plants
8973 views
Methods of Creation of Transgenic Animals
14583 views
DNA Sequencing
5611 views
Analyzing DNA
4331 views
Genomic Library
8864 views
The Human Genome Project
5217 views
Benefits of Human Genome Project
2514 views
Role of Biotechnology in Diagnosis of Diseases
2189 views
Cystic Fibrosis
2080 views
Gene Therapy
4158 views
Gene Therapy (Ex-Vivo)
3917 views
Gene Therapy In-Vivo Method
2883 views
9.2: Tissue Culture (
Practice Test
)
Tissue Culture
9223 views
Types of Tissue Culture
5201 views
Animal Cloning
3382 views
Agricultural plants With Improved Traits
1369 views
Chapter 10 Evolution (
17 videos
)
  (
Practice Test
)
10.1: Theories of Evolution (
Practice Test
)
Concept of Evolution VS Special Creation
7210 views
Evolution From Prokaryotes to Eukaryotes
10401 views
Inheritance of Acquired Characteristics
5921 views
Objections on Lamarckian Theory
3708 views
Weismann's Theory
3648 views
Theory of Natural Selection
11343 views
More on Theory of Natural Selection
2449 views
Variations And Natural Selection
121 views
Alfred Russell Wallace
770 views
10.2: Evidence In Favor Of Organic Evolution (
Practice Test
)
Evidence From Comparative Anatomy
5051 views
Comparative Embryology and Molecular Biology
3493 views
10.3: Importance of Natural Selection As Possible Mechanism For Evolution (
Practice Test
)
Importance of Natural Selection As Possible Mechanism For Evolution
Gene Pool
10442 views
10.4: Artificial Selection And Its Role (
Practice Test
)
Artificial Selection
9753 views
10.5: Gene Frequencies and Their Role In Evolution (
Practice Test
)
Gene Frequencies and Their Role in Evolution
4193 views
Hardy-Weinberg Law And Its Implication
10.6: Endangered Species (
Practice Test
)
Endangered Species
1933 views
Chapter 11 Ecosystem (
26 videos
)
  (
Practice Test
)
11.1: Levels of Organization (
Practice Test
)
Ecology
2941 views
Biosphere
10372 views
11.2: Approaches To Ecology (
Practice Test
)
Autecology and Synecology
6364 views
11.3: The Ecosystem (
Practice Test
)
Components of Ecosystem
5633 views
Abiotic Components
2977 views
Abiotic Components (Temperature and Water)
1520 views
Abiotic Components (Fire, Atmosphere and Wind)
1598 views
Edaphic Factors
3518 views
Topographic Factors
1671 views
Biotic Components
1793 views
Processes in Ecosystem and Interaction Between Biotic Components
1045 views
11.4: Biogeochemical Cycles (
Practice Test
)
The Nitrogen Cycle
3523 views
More on Nitrogen Cycle
1332 views
11.5: Interdependence Of Organisms And Their Significance (
Practice Test
)
Competition
Parasitism
2517 views
Symbiosis
3557 views
More on Symbiosis
1817 views
Commensalism, Grazing
1221 views
11.6: Ecological Succession (
Practice Test
)
Succession
3668 views
Two Major Form of Succession
1999 views
Secondary Succession
1248 views
Hydrosere
844 views
More on Hydrosere
575 views
Wood Land Climax Forest Stage of Hydrosere
430 views
Xerosere
2174 views
More on Xerosere
903 views
Chapter 12 Some Major Ecosystems (
19 videos
)
  (
Practice Test
)
12.1: Life In Fresh Water (
Practice Test
)
Fresh Water (Standing Water Bodies)
1944 views
Components of Pond Ecosystem
3441 views
Biotic components of Pond Ecosystem
12.2: Life In Marine Water (
Practice Test
)
Life in Ocean
988 views
Oceanic Zone
7532 views
12.3: Terrestrial Ecosystem (Biomes) (
Practice Test
)
Tropical Rainforest
2199 views
Coniferous Alpine and Boreal Forests
3215 views
Temperate Deciduous Forests
2523 views
More on Temperate Deciduous Forests
769 views
The Grass Land Ecosystem
6047 views
More on Grass Land Ecosystem
999 views
Tropical Grassland OR Savannah
686 views
Desert Ecosystem
3468 views
Desert Ecosystem (Adaptations in Plants)
1084 views
Desert Ecosystem (Adaptations in Animals)
1357 views
Tundra Ecosystem
2558 views
Alpine Tundra
987 views
12.4: Man's Role In Ecosystem
Man's Role in Ecosystems
12.5: The Flow Of Energy (
Practice Test
)
Biotic Components
1793 views
Chapter 13 Man And His Environment (
25 videos
)
  (
Practice Test
)
13.1: Renewable and Non-Renewable Resources (
Practice Test
)
Renewable and Non-Renewable Resources
4895 views
Renewable Resources (Land and Wildlife)
1832 views
Conventional Energy Resources
1877 views
Non - Conventional Energy Sources
2347 views
Nuclear Power
1342 views
Geothermal Power
840 views
Solar energy
1073 views
Tidal Power and Wind Power
1283 views
13.2: Energy Conservation (
Practice Test
)
Green House Effect
5647 views
How to Save Energy?
13.3: Man's Impact On Environment
Human Impact on Environment
13.4: Effects On Agriculture
Land Pollution
3544 views
13.5: Deforestation And Afforestation (
Practice Test
)
Deforestation, Soil Erosion
2459 views
Effect of Human Activities on Environment
2956 views
13.6: Pollution (
Practice Test
)
Air Pollution
2761 views
Acid Rain
6450 views
Effect of Acid Rain
3475 views
Green House Effect
5647 views
Depletion of Ozone
6088 views
Land Pollution
3544 views
13.7: Non-Material Pollution
Noise Pollution
224 views
13.8: Protection And Conservation of Environment
Conservation of Biodiversity
842 views
13.9: Conservation of Organisms And Their Habitat
Conservation of Biodiversity
842 views
13.10: Health And Diseases (
Practice Test
)
Bacterial Diseases in Man
3324 views
Viral Diseases
4137 views
Facebook
Twitter
Instagram
Youtube
Linkedin