Wednesday, October 7, 2020

Morphology of Flowering Plants | Previous year Questions | Class 11

MORPHOLOGY OF FLOWERING PLANTS 

2010 March 

1. Observe the diagram and answer the questions. (1)


Which character of a flower is indicated by the diagram? Give an example for a plant having flowers with this character.

2. Name the parts of a monocot embryo in the given diagram. (2)


1. ………………..……..
2. ………………..……..
3. ………………..……..
4. ………………..……..

2010 September 

1. Use appropriate terms for the following description. (1)

a. Axillary buds of stems modified as slender and spirally coiled structure for helping plants to climb.
b. Axillary buds of stems modified as woody straight and pointed structure to protect plants from browsing animals.

2. Given below is the floral diagram drawn by Anil based on the flower bud of a plant. (2)


a. Help him to complete the floral formula.
b. Name the family to which this plant belongs.

2011 March 

1. LS of two flowers show 2 types of ovaries. One is superior and the other is inferior. Name the type of flower based on this. (1)

2. Floral formula of a pea plant is given below:
Give the important floral characters of the plant using the floral formula. (2)

2011 October (Improvement) 

1. Teacher showed the chart of aestivation to students and asked them to name the types of aestivation. What is aestivation? Explain any two types of aestivation. (3)

2012 March 

1. Observe the given relation and fill in the blanks. (1)

a. Cucumber: Tendril         Citrus: ………….

2. Given below is the floral diagram of a family you have studied.


a. Identify the family and aestivation of corolla. (1)
b. Describe three other floral characters from the floral diagram using technical terms. (1½)

2012 September (Improvement) 

1. Observe the following diagrams “a and b” and identify the placentation. (1)


2. In cactus both leaves & stem are modified to perform different functions. Name the modifications and identify their functions. (2)

2013 March 

1. Observe the given relation and fill in the blanks. (1)

a. Plumule: Coleoptile Radicle: ………………

2. The diagram given below shows parts of a true fruit.


a. Write the technical name of this fruit developed from a monocarpellary superior ovary. (½)
b. Label the parts A and B (1)
c. Can you distinguish a parthenocarpic fruit from the given fruit? (1)

2013 September-October (Improvement) 

1. Observe the floral diagram and answer the following questions: (1)


a. Name the family.
b. Write the nature of stamen.

2. The following figures show two types of aestivation. Answer the following questions: (2)

a. Identify the types A & B
b. How will you distinguish A & B?

2014 March 

1. Normally, roots grow into the soil. But in some plants like Rhizophora, many roots come out of the ground and grow vertically upwards. What are these roots called? Give their function. (½ + ½ = 1)

2. The following diagram represents five petals of a flower in a plant belonging to a major family.


a. Identify the family. (1)
b. Write the floral formula of the flower. (1)

2014 August (Improvement) 

1. The arrangement of ovules in the ovary is known as placentation. Given below are different types of placentation.

a. Identify (a), (b) and (c).
b. Briefly explain (a), (b) and (c) in one or two sentences. (3)

2015 September (Improvement) 

1. Four stem modifications are given below. Three of them are underground modifications. Pick the odd one out as your answer.

(Potato, Opuntia, Ginger, Colocasia) (1) 

2. Write the names of aestivations in figures 1, 2 and 3. Identify aestivation of petals in pea flowers from the above three aestivations. (2)


2016 March 

1. Observe the given floral diagram.

a) Identify the family. b) Write any four floral characters of the identified family. (3)

2017 March 

1. a) The arrangement of flowers on the floral axis is called

i) Aestivation 
ii) Phyllotaxy
iii) Placentation 
iv) Inflorescence

a) How can you differentiate an actinomorphic flower from a zygomorphic flower? (3)

2017 July (Improvement) 

1. In the family Fabaceae, stamens are described as ........

a) Five, epipetalous 
b) Ten, diadelphous
c) Six, epipetalous 
d) Six, diadelphous (1)

2. Give the scientific term of the following.

a) Internode elongation just prior to flowering. (3)

3. Observe the diagrams given below.

Name the type of flowers A and B. Give one example of each. (2)

OR 

Write two differences between racemose and Cymose inflorescence. (2)

2018 March 

1. Observe the relationship between the first two terms and fill in the blank.

Epipetalous stamen – Brinjal ………………… – Lily

2. Match the following:

A

B

a)

Calotropis

i)

Vexillary

b)

China rose

ii)

Valvate

c)

Cassia

iii)

Twisted

d)

Pea

iv)

Imbricate


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