Home
Current Affairs January 2024

What is the correct answer?

4

Which of the following statement(s) is/are correct about calyx?

A. Calyx is the outermost whorl of the flower and are called sepals.

B. Sepals are green, leaf like and protect the flower in the bud stage.

C. The calyx may be gamosepalous (sepals free) or polysepalous (sepals united).

D. Both (a) and (b)

Correct Answer :

D. Both (a) and (b)


Calyx or sepals are the outermost lower most non-essential but protective whorl of the flower. Sepals are green, leaf like and protect the flower in bud stage. When the sepals are free from one another, the calyx is said to be polysepalous (mustard) & when the sepals are wholly or partially united with one another by their margins then the calyx is said to be gamosepalous.

Related Questions

What is the correct answer?

4

In which of the following plants, a slender lateral branch arises from the base of the main axis and after growing aerially arch downwards to touch the ground?

A. Mint and jasmine

B. Banana and pineapple

C. Grass and stawberry

D. Pistia and Eichhornia

What is the correct answer?

4

Which of the following plants is growing in swampy areas, where many roots come out of the ground and grow vertically upwards?

A. Potato

B. Opuntia

C. Rhizophora

D. Grass

What is the correct answer?

4

Which of the following option shows the correct labelling of the parts of leaf marked as A, B, C and D.
q4

A. A - Lamina, B - Axillary bud, C - Stipule, D - Leaf base

B. A - Lamina, B - Stipule, C - Axillary bud, D - Leaf base

C. A - Lamina, B - Axillary bud, C - Stipule, D - Pedicel

D. A - Leaflet, B - Axillary bud, C - Stipule, D - Leaf base

What is the correct answer?

4

Stilt roots occur in __________ .

A. groundnut

B. rice

C. sugarcane

D. wheat

What is the correct answer?

4

Matching colmun I with column II and choose the correct option.
Column IColumn II
A. ColeorhizaI. Grapes
B. Food storing tissueII. Mango
C. Parthenocarpic fruitIII. Maize
D. Single seeded fruitIV. Radicle developing from monocarpellary superior ovary
E. MembranousV. Endosperm seed coat

A. A III, B I, C IV, D II, E V

B. A IV, B II, C V, D I, E III

C. A V, B I, C III, D IV, E II

D. A IV, B V, C I, D II, E III

What is the correct answer?

4

Which of the following is an example of pinnately compound leaf ?

A. Cucumber

B. Papaya

C. Cucurbita

D. Neem

What is the correct answer?

4

It is a proteinous layer and the outer covering of endosperm which separates the embryo. Identify the layer.

A. Tegmen

B. Scutellum

C. Hyaline layer

D. Aleurone layer

What is the correct answer?

4

Which of the following statements is correct?

A. Imbricate aestivation is found in papilionaceous family.

B. Generally sepals are green, leaf like and protect the flowers in the bud stage.

C. In cymose type of inflorescence, the main axis terminates in a flower, hence is limitless in growth.

D. In axile placentation ovary is one chambered but it becomes two cambered due to formation of the false septum.

What is the correct answer?

4

Read the following statements and answer the questions.
  1. Gynoecium is situated in the centre and other parts of the flower are located on the rim of the thalamus almost at the same level.
  2. Ovary is half-inferior.
  3. Examples are plum, rose and peach.

Which condition of flowers is being described by the above statements ?

A. hypogyny

B. perigyny

C. epigyny

D. none of these

What is the correct answer?

4

Most prominent function of inflorescence is

A. dispersal of seeds.

B. formation of more fruits.

C. formation of pollen grains.

D. dispersal of pollens.

What is the correct answer?

4

Which one of the following option shows the correct labelling of the structure marked as A, B, C & D? 
q10

A. A - Gynoecium, B - Megasporophyll, C - Ovule, D - Thalamus

B. A - Gynoecium, B - Stamen, C - Seed, D - Thalamus

C. A - Microsporophyll, B - Stamen, C - Ovule, D - Thalamus

D. A - Gynoecium, B - Stamen, C - Ovule, D - Thalamus

What is the correct answer?

4

Stem tendrils are found in

A. cucumber

B. pumpkins

C. grapevines

D. all of these

What is the correct answer?

4

The primary roots and its branches constitute the

A. fibrous root system.

B. tap root system.

C. adventitious root system.

D. all of the above

What is the correct answer?

4

Which part of plant is generally green when young and later often become woody and dark brown?

A. stem

B. seed

C. leaves

D. flower

What is the correct answer?

4

The character of flower which is represented by floral formula but not by floral diagram is

A. aestivation

B. placentation

C. position of gynoecium

D. adhesion of stamen

What is the correct answer?

4

Given figures (A, B and C) shows the position of floral parts on thalamus. (given as I, II and III) Select the correct combination.
q7

  1. Hypogynous flower

  2. Perigynous flower

  3. Epigynous flower

A. A-I, B-II, C-III

B. A-I, B-III, C-II

C. A-III, B-II, C-I

D. A-III, B-I, C-II

What is the correct answer?

4

When a flower can be divided into two equal radial halves in any radial plane passing through the centre, it is known as

A. actinomorphic

B. zygomorphic

C. asymmetric

D. bisymmetric

What is the correct answer?

4

Fibrous root system is found in

A. monocotyledonous plants.

B. dicotyledonous plants.

C. bryophytes.

D. gymnosperms.

What is the correct answer?

4

Match column-I with column-II and choose the option which shows their correct combination.
Column-IColumn-II
A. GamosepalousI. Flower of lily
B. PolysepalousII. Sterile anther
C. GamopetalousIII. Free petals
D. PolypetalousIV. Free sepals
E. EpiphyllousV. Fused petals
F. StaminodeVI. Fused sepals

A. A IV, B V, C III, D I, E VI, F II

B. A IV, B III, C V, D I, E II, F VI

C. A VI, B IV, C III, D V, E I, F II

D. A VI, B IV, C V, D III, E II, F I

What is the correct answer?

4

The region of the root-tip whose cells undergo rapid elongation and enlargement and are responsible for the growth of the root in length is called the

A. region of maturation.

B. region of elongation.

C. region of meristematic activity.

D. root-hairs.

What is the correct answer?

4

The main function(s) of root system is/are

A. absorption of water and minerals from the soil

B. storing reserve food material

C. synthesis of plant growth regulators

D. All of the above

What is the correct answer?

4

Which type of function is performed by the fleshy leaves of onion and garlic?

A. Storage

B. Reproduction

C. Photosynthesis

D. Protection

What is the correct answer?

4

Which of the following groups of plants have underground stems?

A. Potato, ginger, turmeric, Euphorbia, zaminkand

B. Potato, ginger, turmeric, zaminkand, Colocasia

C. Potato, Citrus, Opuntia, zaminkand, Colocasia

D. Potato, cucumber, watermelon, zaminkand, Colocasia

What is the correct answer?

4

Which of the following statements are correct?
  1. From the region of elongation, some of the epidermal cells form root hairs.
  2. Pneumatophores are seen in Rhizophora.
  3. Adventitious roots are seen in the banyan tree.
  4. Maize and sugarcane have prop roots.

A. (i) and (iv)

B. (i), (iii) and (iv)

C. (iii) and (iv)

D. (ii) and (iii)

What is the correct answer?

4

How many plants in the list given below have marginal placentation?
  1. Mustard
  2. Gram
  3. Tulip
  4. Asparagus
  5. Arhar
  6. Sunhemp
  7. Chilli
  8. Colchicine
  9. Onion
  10. Moong
  11. Pea
  12. Tobacco
  13. Lupin

A. Four

B. Five

C. Six

D. Three

What is the correct answer?

4

Pollen grains are produced within _________of stamen.

A. ovary

B. anther

C. filament

D. connective

What is the correct answer?

4

Study the following statements and select the correct option
  1. Buds are present in axil of leaflets of the compound leaf.
  2. Pulvinus leaf-base is present in some leguminous plants.
  3. In Alstonia, the petioles expand, become green and synthesize food.
  4. Opposite phyllotaxy is seen in guava.

A. (ii) and (iv) are correct but (i) and (iii) are incorrect.

B. (i) and (iii) are correct but (ii) and (iv) are incorrect.

C. (i) and (iv) are correct but (ii) and (iii) are incorrect.

D. (ii), (iii) and (iv) are correct but (i) is incorrect.

What is the correct answer?

4

Fibrous root system is better adopted than tap root system for

A. transport of organic matter.

B. absorption of water and minerals.

C. storage of food.

D. anchorage of plant to soil.

What is the correct answer?

4

Consider the following statements regarding the root system of angiosperms and choose the correct option given below.
  1. In monocots, the fibrous root system arises from the base of the stem.
  2. The region of elongation is called the root hair region.
  3. In sweet potato, the adventitious roots get swollen and store food.
  4. The stems of maize and sugarcane have supporting roots called prop roots.

A. (i) and (ii) are correct but (iii) and (iv) are wrong.

B. (ii) and (iii) are correct but (i) and (iv) are wrong.

C. (ii) and (iv) are correct but (i) and (iii) are wrong.

D. (i) and (iii) are correct but (ii) and (iv) are wrong.

What is the correct answer?

4

Aleurone layer helps in

A. storage of food in endosperm.

B. protection of embryo.

C. utilization of stored food.

D. all of the above.