Biology MCQs

1496 MCQs — Everyday Science MCQs (Page 66 of 150)

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Pinus Taxus and Picea belong to_________________?

A. Spheospsida
B. Filicineae
C. Gymnosperms
D. Angiosperms

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In life cycle of Pinus megaspores produced by megasporangium divide into 4 megaspores by__________________?

A. Mitosis
B. Meiosis
C. Both depending upon the conditions
D. None of these

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Microspore of a seed plant that contain male gametophyte including the gamete is called_______________?

A. Pollen grain
B. Ovule
C. Microgametophyte
D. Microsporangium

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Monocots are characterized by___________?

A. Number of sepals and petals are 2 or multiple of 2
B. Number of sepals and petals are 3 or multiple of 3
C. Number of sepals and petals are 4 or multiple of 4
D. Number of sepals and petals are 5 or multiple of 5

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Which of the following statement about dicots is incorrect _________________?

A. They have 4 or 5 sepals and petals or their multiple.
B. They have parallel vein pattern on their leaves
C. They are both herbaceous and woody
D. Vascular bundles are ring shaped in their stems.

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Maize is an example of_________________?

A. Monocot
B. Dicot
C. Gymnosperms
D. None of these

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Sporangia of which of the following tracheopytes develop singly on the upper side of sporophylls which may or may not be arranged to form strobili_____________?

A. Psilopsida
B. Lycopsida
C. Sphenopsida
D. Prteropsida

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Chlorosis, i.e., yellowish hue on the leaves results from_____________?

A. Accumulation of toxic waste products in leaves.
B. Deficiency of chlorophyll.
C. Short supplies of mineral nutrients in the soil.
D. All of these

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Chemically auxins are____________?

A. Indole propionic acid.
B. Indole carboxylic acid.
C. Indole acetaldehyde
D. Indole acetic acid.

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Gibberellins may be substituted for ___________ light, therefore promote flowering in long day plants?

A. White
B. Red
C. Blue
D. Green

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