Biology ยท Science General
Botany and Plant Science
5,038 Questions
Botany and plant science delve into the biological study of plant life, covering structural anatomy, physiological processes, and reproductive mechanisms. Key topics include inflorescence patterns, root modifications, and seed development, which are vital for biology sections in medical entrance exams. This collection of practice questions helps solidify understanding of complex plant functions.
Plant ReproductionPlant AnatomyRoot ModificationsInflorescence PatternsPlant Morphology
Botany and Plant Science Questions
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Egg Apparatus
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Antipoda.ls
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Both
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None
B
Correct answer
Explanation
Three antipodal cells are grouped at the chalazal end of the embryo sac (opposite the micropyle). Their function is not fully understood but they may provide nutrition.
C
Correct answer
Explanation
In the 8-nucleate embryo sac, 6 nuclei are surrounded by cell walls (3 in the egg apparatus and 3 antipodals), while the 2 polar nuclei remain in the large central cell.
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Tetrasporic development
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Bisporic development
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Monosporic development
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All
C
Correct answer
Explanation
When a single megaspore develops into the embryo sac, it is referred to as monosporic development.
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A diagrammatic view of a typical Anatropous ovule
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A multicarpellary, Apocarpous gynoecium of Michelia
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Multicarpellary, Syncarpous pistil of Papaver
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A dissected flower of Hibiscus showing pistil
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A diagrammatic view of a typical Anatropous ovule
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A multicarpellary, Apocarpous gynoecium of Michelia
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Multicarpellary, Syncarpous pistil of Papaver
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A dissected flower of Hibiscus showing pistil
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A diagrammatic view of a typical Anatropous ovule
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A multicarpellary, Apocarpous gynoecium of Michelia
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Multicarpellary, Syncarpous pistil of Papaver
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A dissected flower of Hibiscus showing pistil
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A diagrammatic view of a typical Anatropous ovule
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A multicarpellary, Apocarpous gynoecium of Michelia
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Multicarpellary, Syncarpous pistil of Papaver
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A dissected flower of Hibiscus showing pistil
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Inyehument
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Chalaza
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Nucellus
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Funicle
C
Correct answer
Explanation
The megaspore mother cell differentiates in the nucellus, the nutritive tissue of the ovule. The nucellus is enclosed within the integuments.
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Is enclosed within the integuments
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Have abundant reserve food materials
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Embruo sac or female gametophyte is licated in nucellus
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All
D
Correct answer
Explanation
The nucellus is enclosed within the integuments, contains abundant reserve food materials, and houses the embryo sac (female gametophyte). It provides nutrition to the developing embryo.
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Ovule has 1 or 2 integuments
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Integuments encircle nucellus except micropyle
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Opposite the micripyle is chalaza, base of ovule
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All
D
Correct answer
Explanation
Ovules typically have 1-2 integuments that encircle the nucellus except at the micropyle (opening). The chalaza is the base opposite the micropyle where integuments fuse with nucellus.
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Megasporangia
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Ovules
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Both
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None
C
Correct answer
Explanation
Megasporangia are the structures that develop into ovules. Both terms refer to the same reproductive structure within the ovary.
C
Correct answer
Explanation
The pistil consists of three parts: the stigma, the style, and the ovary. The style is the elongated, slender part connecting the stigma to the ovary.
D
Correct answer
Explanation
A pistil (or carpel) is composed of three distinct regions: the stigma, the style, and the ovary.
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Multicarpellary
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Monocarpellary
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Apocarpous
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Syncarpous
D
Correct answer
Explanation
When a gynoecium consists of multiple pistils that are fused together, it is termed syncarpous. Apocarpous refers to free pistils.
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(a) dissected flower of Hibiscus showing Pistil
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(b) Multicarpellary,syncarpous pistil of Papaver
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(c)Multicarpellary,Apocarpous gynoecium of Michelia (d) Anatropus Ovule
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All