17 Biology: Plants (General Science) questions asked in RRB JE previous year papers, each with the correct answer and explanation. Read them free on UTpaper, or attempt the full papers as timed online tests.
A rose plant with white flowers was planted in soil by stem cutting without any grafting. The new plant produced similar white flowers. What does it indicate?
AWhite flowers look good so gardeners plant such roses.
BWhite flowers are the only type of variety available in rose.
CStem cutting is a type of sexual reproduction, so there was no variation.
DStem cutting is a type of asexual reproduction, so there was no variation.
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Correct answer: (D) Stem cutting is a type of asexual reproduction, so there was no variation.
Suppose a gardener wants to plant pea which should be of the dwarf varieties. What do you suggest for the choice of the parent plant seeds by the gardener?
AAll seeds should be of tall varieties.
BAll seeds should be of mixed varieties.
CAny kind of seed can be used.
DAll seeds should be of dwarf varieties.
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Correct answer: (D) All seeds should be of dwarf varieties.
A farmer wants to plant 95 mango trees, 171 banyan trees, and 152 banana trees in
equal rows (in terms of the number of trees). Also, he wants to create distinct rows of
trees, with only one type of tree in each row. Find the minimum number of rows
required.
Why is using compost or vermi-compost preferable to excessive use of fertilizers for
increasing soil fertility?
AIt eliminates bacterial and viral plant diseases.
BIt recycles biological waste and avoids environmental harm.
CIt supplies only micro-nutrients and avoids macronutrients.
DIt replaces the need for irrigation and weeding.
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Correct answer: (B) It recycles biological waste and avoids environmental harm.
How to use these RRB JE General Science questions
Every question here was asked in a real RRB JE paper; the paper and shift are shown on the card, and the number opens the question on its own page. Try each one before tapping Show answer, then attempt the full RRB JE papers as timed tests to check your speed under exam conditions.