The lymphatic system consists of lymph, lymph nodes, and: MCQ with Answer and Explanation

The lymphatic system consists of lymph, lymph nodes, and:
A. Capillaries only
B. Arteries
C. Veins
D. Lymphatic vessels
Answer: Option D
Solution (By JKSSB Mock Tests)
The lymphatic system includes lymph, lymphatic capillaries, vessels, ducts, and lymphoid organs (nodes, spleen, thymus). It returns tissue fluid to the blood, absorbs fats, and defends against pathogens.

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Practice More Biology Questions

Question #1
The process of water evaporation from the leaves that creates a pulling force for water ascent is:
A. Guttation
B. Capillary action
C. Transpiration
D. Root pressure

Correct Answer: Option C


Explanation:
Transpiration from stomata creates negative water potential in leaves, generating a tension (transpiration pull) that draws water upward through the xylem from roots. This cohesion-tension mechanism is the primary driver of water transport in tall trees. Root pressure and capillary action are minor forces.

This question belongs to: Science Biology
Question #2
In genetics, the phenomenon where a heterozygous individual exhibits a phenotype that is intermediate between the two homozygous phenotypes is called:
A. Epistasis
B. Incomplete dominance
C. Codominance
D. Multiple allelism

Correct Answer: Option B


Explanation:
Incomplete dominance is a form of inheritance where the phenotype of the heterozygote is a distinct intermediate blend of the phenotypes of the two homozygotes. Neither allele is completely dominant over the other. A classic example is the flower color in snapdragons (Antirrhinum), where a cross between a homozygous red (RR) and a homozygous white (rr) plant produces heterozygous pink (Rr) offspring. Codominance, in contrast, involves the full expression of both alleles simultaneously (e.g., AB blood type).

This question belongs to: Science Biology
Question #3
Which of the following features differentiates mitosis from meiosis?
A. Separation of sister chromatids
B. Spindle fibre formation
C. Synapsis and crossing over
D. Chromosome duplication

Correct Answer: Option C


Explanation:
Synapsis (pairing of homologous chromosomes) and crossing over (exchange of genetic material) occur during prophase I of meiosis, not in mitosis. Mitosis involves one division producing two genetically identical diploid daughter cells. Meiosis involves two divisions producing four haploid gametes with genetic variation. Chromosome duplication and sister chromatid separation occur in both. Spindle fibres form in both divisions. Thus, synapsis and crossing over are unique to meiosis.

This question belongs to: Science Biology