Question 1

Among the terms listed below, those that are not technically correct names for a floral whorl are I. androecium	II. carpelIII. corollaIV. sepal

Accepted Answer

Sepal and carpel are technically incorrect names for a whorl. This is because sepals collectively form a whorl called as calyx, while the carpel is technically known as gynoecium.

Question 2

Protandry is a condition in which

Accepted Answer

In hermaphroditic plants, a condition in which the development and maturation of the male reproductive part (androecium) occur before the maturation of female reproductive part (gynoecium) to promote cross-pollination and inhibit the process of self-pollination is called as protandry.So, the correct answer is anther mature earlier than stigma.

Question 3

Petals together form

Accepted Answer

CorollaThe leaf lifer covering of flower is called corolla. The individual segment of corolla is called petals. Petals are variously coloured.Function - To attract the pollinators and protection of male and female reproductive part.

Question 4

Petals together form

Accepted Answer

CorollaThe leaf lifer covering of flower is called corolla. The individual segment of corolla is called petals. Petals are variously coloured.Function - To attract the pollinators and protection of male and female reproductive part.

Question 5

Which of the following is the tallest flower?

Accepted Answer

Amorphophallus has the largest unbranched inflorescence in the world. The inflorescence of the talipot palm, Corypha umbraculifera, is larger, but it is branched rather than unbranched.A.titanum is endemic to Sumatra.

Question 6

A multicarpellary, syncarpous gynoecium is found in :(A) Papaver(B) Brinjal(C) Tomato(D) All

Accepted Answer

Option (D) is correct.Papaver, brinjal, and tomato all have multicarpellary, syncarpous gynoecium. In this condition carpels are more than one and fused.

Question 7

Flowers with both androecium and gynoecium are called :(A) Bisexual flowers(B) Anther(C) Unisexual flowers (D) Androgynous

Accepted Answer

Option (B) is correct.Androecium is the male part and gynoecium is the female part, and in those flower have both of these they are called bisexual flower.

Question 8

Anthesis is a phenomenon which refers to

Accepted Answer

(d) : Anthesis is the process of opening floral buds. Reception of pollen by stigma is called pollination. Formation of pollen is called microsporogenesis.

Question 9

The anthesis is a phenomenon, which refers to

Accepted Answer

The anthesis is a phenomenon, which refers to opening of flower bud.

Question 10

Diversity of structures of the inflorescence, flower and floral parts

Accepted Answer

Some flowers are adapted to be pollinated by insects, and others are adapted to be pollinated by wind. Insects are attracted to flowers because of their scent or brightly coloured petals. Many flowers produce a sweet liquid, called nectar, which insects feed on. The female part of the flower is the carpel.

Question 11

An example of a dioecious plant is

Accepted Answer

A dioecious plant is one where the male and female reproductive systems occur on separate plants. While both plants produce flowers, one plant has the male reproductive parts and the other plant has the female parts. A dioecious plant requires two separate plants (a male and a female) to successfully pollinate, and only the female plant bears the fruit. Date palm is dioecious because these plants bear exclusively either male flowers or female flowers.So the correct option is 'date palm'.

Question 12

A flower which contains either stamen or pistil is called

Accepted Answer

The flower is the reproductive organ of a plant. The typical flowers consist of sepals, petals, stamens, and carpels. A flower having both stamens as well as pistil is known as a bisexual flower. Flowers that have either stamens or pistils are known as unisexual flowers. Thus, the answer is unisexual flowers. The correct option is B.

Question 13

Assertion: Flowers are the structures related to sexual reproduction in flowering plants. Reason: Various embryological processes of plants occur in a flower.

Accepted Answer

Flowers are the site of sexual reproduction in flowering plants. Plant embryonic development i.e., embryogenesis is a process that occurs after the fertilization of an ovule to produce a fully developed plant embryo.

Question 14

Cucurbits and papaya plants bear staminate and pistillate flowers. Mention the categories they are put under separately on the basis of the type of flowers they bear.

Accepted Answer

Papaya is dioecious because the staminate and pistillate flowers are borne in two different plants, while cucumber is monoecious because it bears both staminate and pistillate flowers in the same plant.

Question 15

A typical flower has ______different kinds of whorl.

Accepted Answer

A typical flower has four different kind of whorl. These are calyx (green leafy sepals) corolla (bright colored petals), and androecium (male reproductive organ) and gynoecium (female reproductive organ).

Question 16

Both chasmogamous and cleistogamous flowers are present in

Accepted Answer

Commelina produces two types of flower chasmogamous flowers which are similar to the flower of other species with exposed anthers and stigma, and cleistogamous flowers which do not open at all. In such flowers, the anthers and stigma lie close to each other. When anthers dehisce in the flower buds, pollen grains come in contact with the stigma to effect pollination. Thus, cleistogamous flowers are invariably autogamous as there is no chance of cross-pollen landing on the stigma. Cleistogamous flowers assure seed-setting even in the absence of pollinators.

Question 17

Essential whorls of a flower

Accepted Answer

The essential whorls include the androecium and the gynoecium. These are the structures that bring about reproduction in a plant. The non-essential whorls include the calyx and the corolla.

Question 18

The portion of embryonal axis between plumule (future shoot) and cotyledons is called

Accepted Answer

The region of the axis between the point of attachment of cotyledons and the plumule is called epicotyl. The epicotyl is the embryonic shoot above the cotyledons. In most plants the epicotyl will eventually develop into the leaves of the plant.

Question 19

Among the terms listed below, those that are not technically correct names for a floral whorl areI. androecium	II. carpelIII. corollaIV. sepal

Accepted Answer

Sepal and carpel are technically incorrect names for a whorl. This is because sepals collectively form a whorl called as calyx, while the carpel is technically known as gynoecium.

Question 20

In the majority of angiosperms

Accepted Answer

In most of the angiosperms, megaspore mother cell (2n) divides by meiotic reduction division to produce four cells. Out of these, three degenerate and one remains, which forms functional megaspore. This divides mitotically and forms embryo sac.A diagrammatic representation of the mature embryo sac-

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Solutions for Flower: The Site of Sexual Reproduction Important Questions

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