Biology

Morphology of Flowering Plants

Question:

Add the missing floral organs of the given floral formula of Fabaceae.

Answer:

previuos
next

Morphology of Flowering Plants

Q 1.

How do you distinguish between hypogeal germination and epigeal germination? What is the role of cotyledon (s) and the endosperm in the germination of seeds?

Q 2.

Reticulate venation is found in dicot leaves while in monocot leaves venation is of parallel type. Biology being a ‘Science of exceptions’, find out any exception to this generalisation.

Q 3.

You have heard about several insectivorous plants that feed on insects. Nepenthes or the pitcher plant is one such example, which usually grows in shallow water or in marsh lands. What part of the plant is modified into a 'pitcher'? How does this modification help the plant for food even though it can photosynthesize like any other green plant?

Q 4.

Write the floral formula of an actinomorphic, bisexual, hypogynous flower with five united sepals, five free petals, five free stamens and two united carples with superior ovary and axile placentation.

Q 5.

Mango and coconut are ‘drupe’ type of fruits. In mango fleshy mesocarp is edible. What is the edible part of coconut? What does milk of tender coconut represent?

Q 6.

In aquatic plants like Pistia and Eichhomia, leaves and roots are found near

Q 7.

In swampy areas like the Sunderbans in West Bengal, plants bear special kind of roots called _______

Q 8.

You have heard about several insectivorous plants that feed on insects. Nepenthes or the pitcher plant is one such example, which usually grows in shallow water or in marsh lands. What part of the plant is modified into a ‘pitcher’? How does this modification help the plant for food even though it can photosynthesise like any other green plant?

Q 9.

Tendrils are found in the following plants. Identify whether they are stem tendrils or leaf tendrils.
(a) Cucumber
(b) Peas
(c) Pumpkins
(d) Grapevine
(e) Watermelons

Q 10.

Match the followings and choose the correct option.

Group A

Group B

A.

Aleurone layer (i)

Without fertilization

B.

Parthenocarpic fruit (ii)

Nutrition

C.

Ovule (iii)

Double fertilization

D.

Endosperm

(iv)

Seed

Options:

  • A—(i), B—(ii), C—(iii), D—(iv)
  • A—(ii), B—(i), C—(iv), D—(iii)
  • A—(iv), B—(ii), C—(i), D—(iii)
  • A—(ii), B—(iv), C—(i), D—(iii)

Q 11.

In Opuntia the stem is modified into a flattened green structure to perform the function of leaves (i.e., photosynthesis). Cite some other examples of modifications of plant parts for the purpose of photosynthesis.

Q 12.

Tendrils are found in the following plants. Identify whether they are stem tendrils or leaf tendrils,
a.Cucumber
b. Peas
c. Pumpkins  
. Grapevine
e. Watermelons

Q 13.

Reticulate and parallel venation are characteristic of_______and_______

Q 14.

Roots obtain oxygen from air in the soil for respiration. In the absence or deficiency of 02, root growth is restricted or com pletely stopped. How do the plants growing in marshlands or swamps obtain their 02 required for root respiration?

Q 15.

Mango and coconut are ‘drupe’ type of fruits. In mango fleshy mesocarp is edible. What is the edible part of coconut? What does milk of tender coconut represent?

Q 16.

How can you differentiate between free central and axile placentation?

Q 17.

Write floral formula for a flower which, is bisexual; actinoiflorphic; sepals five, twisted aestivation, petals five; valvate aestivation; stamens six; ovary tricarpellary, syncarpous, superior, trilocular with axile placentation.

Q 18.

Seeds of some plants germinate immediately after shedding from the plants while in other plants they require a period of rest before germination. The later phenomena is called as dormancy. Give the reasons for seed dormancy and some methods to break it.

Q 19.

Given below are a few floral formulae of some well known plants. Draw floral diagrams from these formula.
ncrt-exemplar-class-11-biology-solutions-morphology-of-flowering-plants-27

Q 20.

Give two examples of roots that develop from different parts of the angiospermic plant other than the radicle.

Q 21.

Draw diagrams of a typical monocot and dicot leaves.to show their venation pattern.

Q 22.

Why is maize grain usually called as a fruit and not a seed?

Q 23.

Differerifiate between.
a. Bract and Bracteole
b. Pulvinus and petiole
c. Pedicel and peduncle
d. Spike and spadix
e. Stamen and staminoide
f. Pollen and pollenium

Q 24.

Differerifiate between.
a. Bract and Bracteole
b. Pulvinus and petiole
c. Pedicel and peduncle
d. Spike and spadix
e. Stamen and staminoide
f. Pollen and pollenium

Q 25.

Sunflower is not a flower. Explain.

Q 26.

What is meant by modification of root? What type of modification of root is found in the:
(a) Banyan tree
(b) Turnip
(c) Mangrove trees

Q 27.

Draw the labelled diagram of the following:
(i) Gram seed (ii) V. S. of maize seed.

Q 28.

How do the various leaf modifications help plants?

Q 29.

Describe the arrangement of floral members in relation to their insertion on thalamus.

Q 30.

Reticulate and parallel venation are characteristic of ________ and ______ respectively.

Q 31.

The essential functions of roots are anchorage and absorption of water and minerals in the terrestrial plant. What functions are associated with the roots of aquatic plants? How are roots of aquatic plants and terrestrial plants different?

Q 32.

A typical angiosperm flower consists of four floral parts. Give the names of the floral parts and their arrangements sequentially.

Q 33.

How can you differentiate between free central and axile placentation?

Q 34.

Tendrils of grapevines are homologous to the tendril of pumpkins but are analogous to that of pea. Justify the above statement.

Q 35.

Rhizome of ginger is like the roots of other plants that grows underground. Despite this fact ginger is a stem and not a root. Justify.

Q 36.

How is a pinnately compound leaf different from a palmately compound leaf?

Q 37.

Explain with suitable examples the different types of phyllotaxy.

Q 38.

Describe the various types of placentations found in flowering plants.

Q 39.

Define the term inflorescence. Explain the basis for the different types of inflorescence in flowering plants.

Q 40.

Write floral formula for a flower which, is bisexual; actinomorphic; sepals five, twisted aestivation, petals five; valvate aestivation; stamens six; ovary tricarpellary, syncarpous, superior, trilocular with axile placentation.

Q 41.

In epigynous flower, ovary is situated below the _______

Q 42.

Add the missing floral organs of the given floral formula of Fabaceae. ncrt-exemplar-class-11-biology-solutions-morphology-of-flowering-plants-2 (2)

Q 43.

Describe various stem modifications associated with food storage, climbing and protection.

Q 44.

Stolon, offset and rhizome are different forms of stem modifications. How can these modified forms of stem be distinguished from each other?

Q 45.

How do you distinguish between hypogeal germination and epigeal germination? What is the role of cotyledon (s) and the endosperm in the germination of seeds?

Q 46.

In swampy areas like the Sunderbans in West Bengal, plants bear special kind of roots called __________ .

Q 47.

In epigynous flower, ovary is situated below the _________.

Q 48.

Add the missing floral organs of the given floral formula of Fabaceae.

Q 49.

Reticulate venation is found in dicot leaves while in monocot leaves venation is of parallel type. Biology being a 'Science of exceptions', find out any exception to this generalization.

Q 50.

You have heard about several insectivorous plants that feed on insects. Nepenthes or the pitcher plant is one such example, which usually grows in shallow water or in marsh lands. What part of the plant is modified into a 'pitcher'? How does this modification help the plant for food even though it can photosynthesize like any other green plant?