Biology is the science of life — from the tiniest cell to the most complex human systems. This category is designed to support school students (Classes 6–12) as well as undergraduate (UG) learners with clear explanations, exam-focused content, and concept-building resources. You’ll find:
Concept-wise explanations aligned with NCERT and common UG syllabi
Important questions & answers for school exams, NEET foundation, and college tests
Human physiology, genetics, ecology, biotechnology, and cell biology explained simply
Practice questions, MCQs, and revision notes to strengthen understanding
Doubt-solving and conceptual clarity for competitive and academic success
Whether you’re preparing for school exams , building a strong base for NEET , or studying Biology at the undergraduate level , this section helps you learn smarter, revise faster, and understand Biology deeply — not just memorize it.
Learn life sciences the right way — clear concepts, exam relevance, and real understanding.
Q. What is the term for an observable characteristic of an organism?
A.
Genotype
B.
Phenotype
C.
Allele
D.
Locus
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Solution
Phenotype refers to the observable characteristics or traits of an organism.
Correct Answer:
B
— Phenotype
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Q. What is the term for an observable characteristic that is influenced by both genetic and environmental factors?
A.
Genotype
B.
Phenotype
C.
Allele
D.
Locus
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Solution
The term for an observable characteristic influenced by both genetic and environmental factors is phenotype.
Correct Answer:
B
— Phenotype
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Q. What is the term for different forms of a gene?
A.
Chromosomes
B.
Alleles
C.
Genotypes
D.
Phenotypes
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Solution
Alleles are different forms of a gene that can exist at a specific locus on a chromosome.
Correct Answer:
B
— Alleles
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Q. What is the term for plants that can reproduce without fertilization?
A.
Autotrophs
B.
Apomicts
C.
Heterotrophs
D.
Monocots
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Solution
Apomicts are plants that can produce seeds without fertilization, resulting in offspring that are genetically identical to the parent.
Correct Answer:
B
— Apomicts
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Q. What is the term for the contraction phase of the heart cycle?
A.
Diastole
B.
Systole
C.
Arrhythmia
D.
Fibrillation
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Solution
Systole is the contraction phase of the heart cycle, during which the heart pumps blood.
Correct Answer:
B
— Systole
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Q. What is the term for the development of the nervous system in the embryo?
A.
Neurulation
B.
Gastrulation
C.
Organogenesis
D.
Fertilization
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Solution
Neurulation is the process during embryonic development that leads to the formation of the nervous system.
Correct Answer:
A
— Neurulation
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Q. What is the term for the evolutionary process by which species adapt to their environment?
A.
Natural selection
B.
Mutation
C.
Genetic drift
D.
Speciation
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Solution
Natural selection is the evolutionary process by which species adapt to their environment, favoring traits that enhance survival and reproduction.
Correct Answer:
A
— Natural selection
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Q. What is the term for the evolutionary process by which unrelated organisms develop similar traits?
A.
Convergent evolution
B.
Divergent evolution
C.
Adaptive radiation
D.
Co-evolution
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Solution
Convergent evolution occurs when unrelated species evolve similar traits due to similar environmental pressures.
Correct Answer:
A
— Convergent evolution
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Q. What is the term for the evolutionary process where a single ancestral species diversifies into multiple forms to adapt to different environments?
A.
Convergent evolution
B.
Divergent evolution
C.
Extinction
D.
Speciation
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Solution
Divergent evolution refers to the process where a single ancestral species diversifies into multiple forms to adapt to different environments.
Correct Answer:
B
— Divergent evolution
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Q. What is the term for the evolutionary process where plants develop different traits in response to different environments?
A.
Divergent evolution
B.
Convergent evolution
C.
Adaptive radiation
D.
Co-evolution
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Solution
Divergent evolution occurs when related species evolve different traits to adapt to different environments.
Correct Answer:
A
— Divergent evolution
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Q. What is the term for the exchange of gases between the blood and body tissues?
A.
External respiration
B.
Internal respiration
C.
Cellular respiration
D.
Pulmonary ventilation
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Solution
Internal respiration refers to the exchange of gases between the blood and the tissues of the body.
Correct Answer:
B
— Internal respiration
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Q. What is the term for the first cell formed after fertilization?
A.
Zygote
B.
Blastocyst
C.
Embryo
D.
Fetus
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Solution
The zygote is the initial cell formed when a sperm fertilizes an egg.
Correct Answer:
A
— Zygote
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Q. What is the term for the genetic makeup of an individual?
A.
Phenotype
B.
Genotype
C.
Karyotype
D.
Allele
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Solution
Genotype refers to the genetic makeup of an individual, while phenotype refers to the observable traits.
Correct Answer:
B
— Genotype
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Q. What is the term for the growth response of a plant to light?
A.
Thigmotropism
B.
Phototropism
C.
Hydrotropism
D.
Gravitropism
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Solution
Phototropism is the growth response of a plant to light, typically resulting in bending towards the light source.
Correct Answer:
B
— Phototropism
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Q. What is the term for the growth response of plants to gravity?
A.
Phototropism
B.
Gravitropism
C.
Thigmotropism
D.
Hydrotropism
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Solution
Gravitropism is the growth response of plants to the direction of gravity.
Correct Answer:
B
— Gravitropism
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Q. What is the term for the movement of water and solutes from the soil into the root cells?
A.
Absorption
B.
Translocation
C.
Transpiration
D.
Evaporation
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Solution
Absorption refers to the process of taking up water and nutrients from the soil into the root cells.
Correct Answer:
A
— Absorption
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Q. What is the term for the movement of water from the roots to the leaves?
A.
Translocation
B.
Transpiration
C.
Absorption
D.
Evaporation
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Solution
Translocation refers to the movement of water and nutrients through the plant, specifically from roots to leaves.
Correct Answer:
A
— Translocation
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Q. What is the term for the movement of water from the soil into the roots?
A.
Transpiration
B.
Absorption
C.
Evaporation
D.
Condensation
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Solution
Absorption refers to the process of water moving from the soil into the roots of the plant.
Correct Answer:
B
— Absorption
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Q. What is the term for the observable characteristics of a plant that are influenced by its genetic makeup?
A.
Genotype
B.
Phenotype
C.
Allele
D.
Chromosome
Show solution
Solution
Phenotype refers to the observable characteristics of an organism, which are influenced by its genotype and environment.
Correct Answer:
B
— Phenotype
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Q. What is the term for the observable characteristics of a plant that result from the interaction of its genotype and environment?
A.
Phenotype
B.
Genotype
C.
Allele
D.
Chromosome
Show solution
Solution
Phenotype refers to the observable traits of an organism, influenced by both genetic and environmental factors.
Correct Answer:
A
— Phenotype
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Q. What is the term for the observable characteristics of a plant that result from the interaction of its genotype with the environment?
A.
Phenotype
B.
Genotype
C.
Allele
D.
Chromosome
Show solution
Solution
Phenotype refers to the observable traits of an organism, influenced by both genetics and environmental factors.
Correct Answer:
A
— Phenotype
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Q. What is the term for the observable characteristics of an organism resulting from the interaction of its genotype with the environment?
A.
Genotype
B.
Phenotype
C.
Heredity
D.
Mutation
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Solution
The phenotype is the set of observable characteristics of an organism, influenced by both genetic and environmental factors.
Correct Answer:
B
— Phenotype
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Q. What is the term for the process by which a seed absorbs water and begins to grow?
A.
Germination
B.
Pollination
C.
Fertilization
D.
Photosynthesis
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Solution
Germination is the process where a seed absorbs water and begins to grow into a new plant.
Correct Answer:
A
— Germination
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Q. What is the term for the process by which a seed develops into a new plant?
A.
Germination
B.
Pollination
C.
Fertilization
D.
Propagation
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Solution
Germination is the process by which a seed develops into a new plant.
Correct Answer:
A
— Germination
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Q. What is the term for the process by which a sperm and egg combine to form a zygote?
A.
Fertilization
B.
Implantation
C.
Gestation
D.
Ovulation
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Solution
Fertilization is the process where a sperm cell merges with an egg cell to form a zygote.
Correct Answer:
A
— Fertilization
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Q. What is the term for the process by which a sperm and egg fuse?
A.
Fertilization
B.
Cleavage
C.
Gastrulation
D.
Implantation
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Solution
Fertilization is the process where a sperm cell fuses with an egg cell to form a zygote.
Correct Answer:
A
— Fertilization
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Q. What is the term for the process by which a sperm cell fertilizes an egg cell?
A.
Ovulation
B.
Fertilization
C.
Implantation
D.
Gestation
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Solution
Fertilization is the process where a sperm cell successfully merges with an egg cell.
Correct Answer:
B
— Fertilization
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Q. What is the term for the process by which organisms better adapted to their environment tend to survive and produce more offspring?
A.
Natural selection
B.
Genetic drift
C.
Mutation
D.
Speciation
Show solution
Solution
Natural selection is the process by which organisms that are better adapted to their environment tend to survive and reproduce.
Correct Answer:
A
— Natural selection
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Q. What is the term for the process by which organisms change over time through adaptations?
A.
Evolution
B.
Reproduction
C.
Homeostasis
D.
Metabolism
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Solution
Evolution is the process through which species undergo changes over time due to adaptations to their environment.
Correct Answer:
A
— Evolution
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Q. What is the term for the process by which plants lose water vapor through small openings in their leaves?
A.
Transpiration
B.
Respiration
C.
Photosynthesis
D.
Germination
Show solution
Solution
Transpiration is the process of water vapor loss from plant leaves through stomata.
Correct Answer:
A
— Transpiration
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