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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Smilax
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Ranunculus
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Calophyllum
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Dioscorea
A
Correct answer
Explanation
While parallel venation is a characteristic of monocots, Smilax is a notable exception among dicots that exhibits parallel venation.
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stipule
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leaf base
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lamina
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leaf apex
C
Correct answer
Explanation
In Nepenthes (pitcher plant), the pitcher is a modification of the leaf lamina, while the lid is formed by the leaf apex and the tendril by the midrib.
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positively geotropic
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negatively geotropic
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positively heliotropic
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negatively hydrotropic
A
Correct answer
Explanation
Prop roots grow downwards from branches into the soil to provide structural support. Because they grow in the direction of gravity, they are positively geotropic.
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type of ovary in a plant
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mode of arrangement of leaves on the stem
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type of roots
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arrangement of sepals and petals in a flower
B
Correct answer
Explanation
Phyllotaxy refers to the pattern or mode of arrangement of leaves on the stem or branch, such as alternate, opposite, or whorled.
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root cap
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region of cell elongation
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meristematic zone
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region of maturation
D
Correct answer
Explanation
Root hairs are unicellular extensions of the epidermal cells found specifically in the region of maturation, where they are responsible for water and mineral absorption.
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hypanthodium
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spadix
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polychasial cyme
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capitulum
D
Correct answer
Explanation
The capitulum (or head) inflorescence is considered the most highly evolved because it condenses many small flowers into a single structure that mimics a single flower, optimizing pollination efficiency.
C
Correct answer
Explanation
After fertilization, the ovary of the flower matures into a fruit, while the ovules inside the ovary develop into seeds.
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Compositae
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Euphorbiaceae
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Cruciferae
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Solanaceae
B
Correct answer
Explanation
Cyathium inflorescence is characteristic of family Euphorbiaceae.The flower-like characteristics of the cyathia are underlined by brightly coloured nectar glands and often by petal-like appendages to the nectar glands, or brightly coloured, petal-like bracts positioned under the cyathia.
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pollen tube
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water
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male gamete
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none of these
B
Correct answer
Explanation
Micropyle in seed helps the entry of water during germination.The entry of water activates the embryo cells.
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syconus
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sorosis
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samara
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siliqua
A
Correct answer
Explanation
A collective fleshy fruit, in which the ovaries are hidden within a hollow receptacle, as in the fig.
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Leguminosae
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Cucurbitaceae
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Malvaceae
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Cruciferae
A
Correct answer
Explanation
Marginal placentation is found in most of the members of the family Leguminosae.he ovary in which the placenta forms a ridge along the ventral suture of the ovary and the ovules develop on two separate rows is known to have marginal placentation.
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Stamen
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Carpel
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Ovary
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Stigma
B
Correct answer
Explanation
The carpel (or pistil) is the female reproductive organ of a flower, consisting of the ovary, style, and stigma.
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Seeds
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Flowers
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Fruits
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Stem
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Leaves
A
Correct answer
Explanation
Swiss engineer George de Mestral invented velcro after studying burrs or seeds that stuck on clothes and animal fur. He noticed that the burrs had hooks that caught on anything with loops. The same mechanism is used in making velcro.
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root
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stem
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rhizome
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foliage leaf
A
Correct answer
Explanation
A carrot is a modified taproot that stores food, classifying it as a root tuber.
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Shoot apical meristem
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Intercalary meristem
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Lateral cambium
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Root apical meristem