GS Biology Questions with Answers | General Science GK | Page 32

GS Biology questions with answers enhance your general science knowledge, especially for exams like SSC, Railways, and UPSC. Biology is an important branch of general science that deals with the study of life, organisms, and their vital processes. These general science questions and answers cover topics such as cells, human anatomy, genetics, and ecology — frequently asked in competitive exams. Practicing these questions helps you understand biological concepts clearly and boosts your score in the general awareness section. Strengthen your science fundamentals and prepare effectively for multiple-choice questions in upcoming tests.

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Q311

If a dihybrid pea plant heterozygous for flower colour (red dominant) and seed shape (round dominant) undergoes selfing, types of gametes produced are:

A 2
B 4
C 8
D 16

Answer: Option B

Explanation: Four types of gametes are produced due to independent assortment.

Q312

The crossing of a homozygous tall plant with a dwarf yields plants in the ratio:

A Two tall and two dwarf
B One homozygous tall, one homozygous dwarf and two heterozygous tall
C All homozygous dwarf
D All homozygous tall

Answer: Option B

Explanation: This cross results in heterozygous tall and homozygous extremes.

Q313

Blue eye colour in humans is recessive to brown eye colour. Expected offspring from crossing blue-eyed woman with brown-eyed man with blue-eyed mother are likely:

A All blue-eyed
B Three blue-eyed and one brown-eyed
C All brown-eyed
D One blue-eyed and one brown-eyed

Answer: Option D

Explanation: Likely a 1:1 ratio of blue to brown due to heterozygosity.

Q314

The genotype of a dominant parent is determined by crossing with the recessive parent. This cross is called:

A Back cross
B Test cross
C Long cross
D Out cross

Answer: Option B

Explanation: Test cross reveals genotype of dominant phenotype.

Q315

Chromosome theory of heredity was postulated by

A Charles Darwin
B Gregor Mendel
C Sutton and Boveri
D Har Gobind Khorana

Answer: Option C

Explanation: Sutton and Boveri linked chromosomes to heredity.

Q316

Continuity of germplasm theory by WEISMANN was proposed in

A 1838
B 1883
C 1865
D 1859

Answer: Option B

Explanation: Weismann proposed germplasm continuity in heredity.

Q317

Allosomes are

A Bead-like structures on chromosomes
B Sex chromosomes
C Rounded bodies
D Node-like structures on chromosomes

Answer: Option B

Explanation: Allosomes refer to sex chromosomes.

Q318

Mechanical tissues are very poorly developed in

A xerophytes
B halophytes
C hydrophytes
D lithophytes

Answer: Option C

Explanation: Hydrophytes have poorly developed mechanical tissues due to water buoyancy.

Q319

Desert can be converted into green land by

A halophytes
B psammophytes
C tropical trees
D oxylophytes

Answer: Option B

Explanation: Psammophytes are sand-loving plants that help in desert greening.

Q320

Mangrove plants show vivipary. This is

A germination of seeds within fruits while still attached to parent plant
B germination of seeds in fruits on the soil
C germination of seeds within fruit on sterile artificial culture medium
D germination of seeds only after dispersal of fruits

Answer: Option A

Explanation: Vivipary is seed germination on the parent plant before detachment.

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GS Biology Questions and Answers

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