Tag: botany

Questions Related to botany

A true fruit is the one in which the, fleshy part of the fruit is derived from

botany pollination, fertilization and development of endosperm and embryo fruits and seeds fruit and its type fertilization events

  1. Thalamus

  2. Ovary

  3. Inflorescene axis

  4. Apocarpous gynoccium

Show answer
Correct Option: B
Explanation:

A true fruit is the one in which the fleshy part of the fruit is derived from the ovary. For example, mango. A false fruit or pseudo-carp is derived from the floral parts other than ovary. Jackfruit and pineapple develop from the entire inflorescence. Apple develops from the thalamus. When the gynoecium has free and unfused carpel it is known as apocarpous.

So, the correct answer is option B.

Albumin is also known as _________.

botany pollination, fertilization and development of endosperm and embryo fruits and seeds fruit and its type fertilization events

  1. Perisperm

  2. Synergids

  3. Plumule

  4. Endosperm

Show answer
Correct Option: D
Explanation:

Perisperm is nutritive tissue outside embryosac. 
Synergid is supportive tissue. 
Plumule is involved  in the formation of shoot system. 
Endosperm is nutritive tissue and is also called albumin.
So, the correct option 'Endosperm'.

Caruncle of Albuminous dicot seed is derived from

botany pollination, fertilization and development of endosperm and embryo fruits and seeds fruit and its type fertilization events

  1. Cotyledon

  2. Embryo

  3. integument

  4. None of these

Show answer
Correct Option: B
Explanation:
The caruncle is the white spongy outgrowth of the micropyle seen in some species and derived from embryo. It absorbs water readily so that it may be of some use in germination.
So the correct answer is 'Embryo'.

Which one of the following is a true fruit?

botany pollination, fertilization and development of endosperm and embryo fruits and seeds fruit and its type fertilization events

  1. Apple

  2. Pear

  3. Cashewnut

  4. Coconut

Show answer
Correct Option: A

Read the following statements:
Which of the above statements are correct?
(i) Wheat, maize barley, castor and sunflower seeds are endospermic or albuminous
(ii) Most zygotes divide only after certain amount of endosperm is formed
(iii) Though the seed differ greatly, the early stages of embryo development is similar in both monocots and dicots
(iv) The zygote divides to form proembryo and subsequently globular, heart-shaped and mature embryo.
(v) Epicotyl and hypocotyl are absent in monocot seeds

botany pollination, fertilization and development of endosperm and embryo fruits and seeds fruit and its type fertilization events

  1. (i),(ii),(iii)and (iv)

  2. (i),(ii)and (iii)

  3. (i),(iii)and( v)

  4. (iii),(iv)and (v)

  5. (i),(v) and (ii)

Show answer
Correct Option: A

Fruits of Banyan tree develops from

botany pollination, fertilization and development of endosperm and embryo fruits and seeds fruit and its type fertilization events

  1. Raceose inflorescene

  2. Cymose inflorescene

  3. Hypanthodium inflorescene

  4. Cyathium inflorescene

Show answer
Correct Option: A
Explanation:
  • The racemose inflorescence is also called as indefinite inflorescence.
  • The racemose inflorescence is a type of flowering shoot in which the growing region at the tip of the flower stalk continues to produce new flower buds during growth.
  • As a result, the youngest flowers are at the top and the oldest flowers are at the base of the stalk.
  •  Hence, Fruits of Banyan tree develops from Racemose inflorescence.
  • So, the correct answer is 'Racemose inflorescence'.

Which of the following is incorrect?

botany pollination, fertilization and development of endosperm and embryo fruits and seeds fruit and its type fertilization events

  1. Mango and coconut are drupe fruit

  2. According to Euro norm IV sulphur content for petrol is 50 ppm

  3. $CO _2$ and other poisonous gases cause pollution

  4. Apple is a true fruit

Show answer
Correct Option: D
Explanation:
  • True fruit is one which is derived from the ovary or rather fertilized from the ovary of the flower and its seeds are the result of the transformation of ovules. For example, Mango.
  • False fruits are grown from parts of plants other than the ovary.For example,Apple,banana,etc.
  • Hence Apple is a false fruit because, In apple, a major part of the fruit is formed from the thalamus, not from the ovary that's the reason why it is called a false fruit.
  • So, the correct answer is 'Option D'.

Endosperm may completely be consumed by the developing embryo before in maturation in

botany pollination, fertilization and development of endosperm and embryo fruits and seeds fruit and its type fertilization events

  1. Oat

  2. Wheat

  3. Barley

  4. Pea and groundnut

Show answer
Correct Option: D
Explanation:

Endosperm is a food laden tissue, surrounding the embryo on all sides or either present on one side of the embryo. It is of two types:
1. Non-endospermic or exalbuminous seeds
2. Endospermic or albuminous seeds.
In these seeds like pea, groundnut, the endosperm is completely consumed by the embryo, which belongs to the non-endospermous seeds category.

An example of a seed with endosperm, perisperm and caruncle is 

botany pollination, fertilization and development of endosperm and embryo fruits and seeds fruit and its type fertilization events

  1. Castor

  2. Cotton

  3. Coffee

  4. Lily

Show answer
Correct Option: A
Explanation:

Endosperm is developed from triploid primary endosperm nucleus in central cell of embryo sac. The triploid nucleus is formed after vegetative fertilization i.e. fusion of male gamete with secondary nucleus of central cell, also known as triple fusion. Endosperm serves to provide essential nutrients to the growing embryos. Seeds having a fleshy storage endosperm that lie just beneath tegmen and persists upto maturity are termed as albuminous seeds. Castor, coffee, lily and cotton seeds are albuminous. Pericarp is residual nucellus that persists in seeds. Castor, cotton, lily and coffee seeds have pericarp present just below the seed coat and around the kernel. Pericarp surrounds endosperm in these seeds. Castor seeds exhibit enlargement of cells present at the tip of outer integument which forms a fleshy outgrowth at micropylar end of the seed is called as caruncle. It serves in seed germination and seed dispersal by animals. Cotton, lily and coffee seeds lack caruncle.

Thus, the correct answer is option A.

Some plants produce a well developed aril. Point out the pair wherein both the members produce aril

botany pollination, fertilization and development of endosperm and embryo fruits and seeds fruit and its type fertilization events

  1. Coconut and Nutmeg

  2. Inga dulcis and Cashew-nut

  3. Cashewnut and Coconut

  4. Cashew-nut and Nutmeg

Show answer
Correct Option: D
Explanation:

Aril is bright-colored fleshy outgrowth and succulent investment of the seed in a few plants, e.g., Cashew nut and Nutmeg.