Types of Flowers

Q. Flowers are unisexual in :

1. Cucumber
2. China rose
3. Pea
4. Onion

Q.

Name the part of the flower that the tassels of the corn cob represent.

Q. Which is correct about Viola?

1. Commonly called common pansy
2. Bears two types of flowers chasmogamous and cleistogamous
3. Produce assured seed-set even in the absence of pollinators
4. All of the above

Q.

Give examples of the tetramerous and pentamerous flowers.

Q. Tetradynamous condition is found in:

1. Hibiscus rosa-sinesis
2. Ocimum sanctum
3. Helianthus annuus
4. Brassica campestris

Q. Cucurbits are

1. Monoecious
2. Dioecious
3. Polygamous
4. Synoecious

Q. Flower is complete when it has

1. calyx, corolla, androecium and gynoecium
2. calyx and corolla
3. androecium and gynoecium
4. corolla, androecium and gynoecium

Q. A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the above situation is:

1. Plant is monoecious
2. Plant is dioecious and bears both pistillate and staminate flowers
3. Plant is dioecious and bears only staminate flowers.
4. Plant is dioecious and bears only pistillate flowers

Q.

A plant with separate male and female flowers is

1. Unisexual

2. Bisexual

3. Monoecious

4. Dioecious

Q.

What is the difference between Palea and Lemma?

Q. In castor and maize plants

1. autogamy is prevented but not geitonogamy
2. both autogamy and geitonogamy are prevented
3. male and female flowers are borne by different plants
4. anthers and stigma are placed at different positions to encourage cross pollination

Q.

A dioecious plant has

1. Bisexual flowers

2. Both male and female flowers

3. Either male or female flowers

4. Bisexual and neutral flowers

Q.

Identify the trimerous flower from the following options.

1. Petunia

2. Gloriosa

3. Sesbania

4. Trifolium

Q. In Maize, the flowers are

1. absent
2. unisexual but on different plants
3. bisexual
4. unisexual but on the same plant

Q.

Identify the trimerous flower from the following options.

1. Petunia

2. Gloriosa

3. Sesbania

4. Trifolium

Q. Flowers are unisexual in:

1. Onion
2. Pea
3. Cucumber
4. China rose

Q. A flower without the non-essential whorls is called

1. dioecious
2. hermaphrodite
3. monoecious
4. achlamydeous

Q.

What are chasmogamous flowers? Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.

Q. Flowers are unisexual in :

1. Onion
2. Pea
3. Cucumber
4. China rose

Q. Choose the correct option from the brackets:​

(ii) The condition in which stigma and anther grow at different heights (herkogamy, heterostyly, Dichogamy, self-sterility)​

Q. Flower is complete when it has

1. calyx, corolla, androecium and gynoecium
2. calyx and corolla
3. androecium and gynoecium
4. corolla, androecium and gynoecium

Q.

Define the following:
Incomplete flower.

Q. Flower in which only one set of essential organ is present are said to be

1. bisexual
2. parthenocarpic
3. unisexual
4. none of these

Q.

How many plants in the list given below have unisexual flowers?Castor, maize, pea, papaya, wheat, rice, Vallisneria, tomato, brinjal, gram, bean.

1. Six
2. Three
3. Four
4. Five

Q.

A dioecious plant has

1. bisexual flowers

2. both male and female flowers

3. bisexual and neuter flowers

4. either male or female flowers

Q.

Identify the trimerous flower from the following options.

1. Petunia

2. Gloriosa

3. Sesbania

4. Trifolium

Q.

cleistogamous flowers are said to be invariably autogamous.Why?

Q. The plants such as papaya can perform:
[0.7 mark]

1. Geitonogamy mostly but xenogamy occasionally
2. Geitonogamy always
3. Xenogamy but not geitonogamy
4. Autogamy as well as geitonogamy

Q. Which type of association is found in between entomophilous flower and pollinating agent : -

1. Mutualism
2. Commonsalism
3. Coperation
4. Co-evolution

Q. Ovary is half-inferior in the flowers of

1. plum
2. guava
3. brinjal
4. cucumber