HARD
7th CBSE
IMPORTANT
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The diagram shows the flower of a lily plant. Identify the structures labelled A and B along with their function.

85.71% studentsanswered this correctly

Important Questions on Reproduction in Plants

HARD
7th CBSE
IMPORTANT

A worm X found in freshwater and slow-moving streams has been accidentally cut into three pieces. It was observed that in due course of time, each cut piece of the worm developed to become a complete worm by growing all the missing parts. 

“Name another organism Y which possesses the same characteristic of growing fully from its cut body.”

State whether X and Y are unicellular and/ or multicellular organisms.

MEDIUM
7th CBSE
IMPORTANT

Moninder wants to find out the best temperature for mustard seeds to germinate. He uses three Petri dishes. Each dish has a layer of moist tissue paper covered with 30 mustard seeds. Moninder puts one dish in a warm cupboard, one in a cool cupboard and one in a refrigerator. He waters all of the seeds regularly for 21 days. His results for the first four days are shown in the table.

  Number of germinated mustard seeds Number of germinated mustard seeds Number of germinated mustard seeds Number of germinated mustard seeds
  Day 1 Day 2 Day 3 Day 4
Warm cupboard 0 5 20 24
Cool cupboard 0 2 8 14
Refrigerator 0 0 0 0

What conclusion can you draw from Moninder's results? 

MEDIUM
7th CBSE
IMPORTANT
Coffee trees have flowers with white petals and a very pleasant scent. Use this information to determine whether coffee trees are insect-pollinated or wind-pollinated. Explain.
HARD
7th CBSE
IMPORTANT

Study the given table and select the correct option.

Methods of reproduction Examples
Budding P
Spore formation Q
Fragmentation R
Vegetative propagation S

 

  P Q R S
(A) Dahlia Spirogyra Rhizopus Begonia
(B) Yeast Rhizopus Spirogyra Begonia
(C) Spirogyra Rhizopus Begonia Dahlia
(D) Dahlia Yeast Spirogyra Rhizopus
HARD
7th CBSE
IMPORTANT

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Rita purchesed three different kinds of flowers on the potted plants as shown below and left them undisturbed. Which of these three flowers is most likely to produce fruits and seeds? Explain ur answer.

HARD
7th CBSE
IMPORTANT

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Which seed is most likely to be dispersed by wind? Explain your answer.

HARD
7th CBSE
IMPORTANT

Amit cut the stem of a hornwort plant into two pieces. He placed both the pieces under water. After a week, Shekhar found both the pieces growing as new plants. 

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What can be concluded from the activity?

HARD
7th CBSE
IMPORTANT
Sohan observed flowers of two different plants X and Y. Flowers of X are large, coloured, showy and produce nectar while flowers of Y are small, dull without nectar. Pollen grains of X are sticky and bigger while pollen grains of Y are small in size and dry. What could be the pollinating agent for both the flowers? Explain your answer.