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Fruits and seeds - class-XII

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Endosperm, a product of double fertilisation in angiosperms is absent in the seeds of

  1. Coconut

  2. Orchids

  3. Maize

  4. Castor


Correct Option: B
Explanation:

Orchid seed is a non-endospermic seed, i.e., endosperm is absent in it. Endosperm is a nourishing tissue present in the seed which nourishes the developingembryo. In orchid seed endosperm is absent because it is used up during the time ofseed development. Nourishment for germinating seed is provided by the food material present in cotyledons. 


Rest of the options are examples of endospermic seeds.

The mature seeds of plants such as gram and peas, possess no endosperm, because

  1. these plants are not angiosperms

  2. there is no double fertilisation in them

  3. endosperm is not formed in them

  4. endosperm gets used up by the developing embryo during seed development.


Correct Option: D
Explanation:
Gram and pea both are dicot seeds. Cotyledons take up most of the space in the seed and these cotyledons become filled with the material that will nourish the growing embryo. therefore the endosperm is used up by the developing embryo.

So, the correct option is endosperm gets used up by the developing embryo during seed development.

Endospermic seeds are found in

  1. Barley

  2. Castor

  3. Pea

  4. Both (a) and (b)


Correct Option: D
Explanation:

Those seeds in which the endosperm persists even after germination are called endospermous seeds. Barley and castor are examples of monocot and dicot endospermous seeds respectively.

So, the correct answer is 'Both (a) and (b)'

Careals, castor and coconut possess ______ seeds.

  1. Endospermic

  2. Zoospermic

  3. Non-albuminous

  4. None of these


Correct Option: A
Explanation:

If the endosperm exists after the seed has germinated then the seeds are referred to as endospermous seeds, this could be due to greater synthesis or lesser utilization by the developing embryo.

Examples, cereals, castor and coconut
So, the correct answer is 'Endospermic'

Endosperm is completely consumed by the developing embryo in

  1. Pea and groundnut

  2. Maize and castor

  3. Castor and groundnut

  4. Maize and pea


Correct Option: A
Explanation:

In pea and groundnut, endosperm is consumed by developing embryo in the seed. The endosperm is completely absorbed by the growing embryo and the food reserve gets stored in the cotyledons. Such seeds are called non-endospermic or exalbuminous.

So, the correct option is 'Pea and groundnut'.

Endospermic seeds are found in.

  1. Castor

  2. Barley

  3. Coconut

  4. All of these


Correct Option: D
Explanation:
Endospermic seeds are those that have an endosperm in the mature seed. It is fleshy, oily, surrounds the embryo, and functions as the sole food storage organ. Inside the seed coat, a thin and papery cotyledon is present. Monocot plants have endospermic seeds.
So, the correct option is 'All of these'.

In albuminous seeds, food is stored in ________ and in non-albumious seeds, it is stored in ___________.

  1. Endosperm, cotyledons

  2. Cotyledons, endosperm

  3. Nucellus, cotyledons

  4. Endosperm, radicle


Correct Option: A
Explanation:
Albuminous seeds are the seeds which have food stored in the special nourishing tissue called as endosperm that remains persistent till maturity. Cotyledons only act as food sucking organs and not food storage organs e.g., Castor seed. Non-albuminous seeds are the seeds which have the stored food and the cotyledons in a special structure called as a kernel. It does not remain until the embryo is mature. e.g. Pea seed.
So, the correct option is 'Endosperm, cotyledons'.

In which one of the following, would you expect to find glyoxysomes?

  1. Endosperm of wheat

  2. Endosperm of castor

  3. Palisade cells in leaf

  4. Root hairs


Correct Option: B
Explanation:

Glyoxysomes are microbodies. These microbodies occur only in fat rich plant cells like castor seeds where they take part in $\beta$-oxidation of fats and perform glyoxylate cycle. Glyoxysomes possess catalase enzyme.

Assertion (A). All the fruits that we eat are not real fruits.
Reason (R). In few plants, floral parts like thalamus or pedicel also, contribute to fruit formation. Such fruits are called false fruits.

  1. A and R are true and R is the correct explanation of A

  2. A and R are true and R is not the correct explanation of A

  3. A is true R is false

  4. A is false, R is true


Correct Option: A
Explanation:
All fruits are not real or true fruits as some fruits like apples show the involvement of thalamus or other tissues in formation of the edible bulk of the fruit. They are called false fruits. False fruits usually develop from an inferior ovary.
So, the correct answer is 'A and R are true and R is the correct explanation of A'

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

  1. Thalamus

  2. Ovary

  3. Inflorescene axis

  4. Apocarpous gynoccium


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 _________.

  1. Perisperm

  2. Synergids

  3. Plumule

  4. Endosperm


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

  1. Cotyledon

  2. Embryo

  3. integument

  4. None of these


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?

  1. Apple

  2. Pear

  3. Cashewnut

  4. Coconut


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

  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)


Correct Option: A

Fruits of Banyan tree develops from

  1. Raceose inflorescene

  2. Cymose inflorescene

  3. Hypanthodium inflorescene

  4. Cyathium inflorescene


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?

  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


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

  1. Oat

  2. Wheat

  3. Barley

  4. Pea and groundnut


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 

  1. Castor

  2. Cotton

  3. Coffee

  4. Lily


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

  1. Coconut and Nutmeg

  2. Inga dulcis and Cashew-nut

  3. Cashewnut and Coconut

  4. Cashew-nut and Nutmeg


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.

Morphologically the white fluffy edible mass in maize is 

  1. Seed coat

  2. Endosperm

  3. Perisperm

  4. Seed


Correct Option: B
Explanation:

The monocot plants are known for the presence of the embryo and edible endosperm in the seed. The endosperm is large, whitish and fluffy in the case of the maize. The endosperm of the maize is considered as edible which is used for the production of popcorn. The endosperm swells and comes out to form the popcorn which is highly nutritious.

Thus, the correct answer is option B. 

A dicot having exalbuminous seed is

  1. Pea

  2. Castor

  3. Bean

  4. Gram


Correct Option: A
Explanation:

The seed which store food material in cotyledons are called exalbuminous seed.

A. Pea-exalbuminous  seed.
B. Castor- albuminous  seed.
C. Bean- albuminous  seed.
D. Gram- albuminous  seed.
So, the correct answer is 'Pea'.

A dicot albuminous seed is

  1. Pea

  2. Castor

  3. Bean

  4. Gram


Correct Option: B
Explanation:

The seed which store food materials in endosperm are called albuminous seed.

A. Pea- exalbuminous seed.
B. Castor-  albuminous seed
C. Bean- exalbuminous seed.
D. Gram- exalbuminous seed
So, the correct answer is 'Castor'.

In exalbuminous seed, the food is generally stored in

  1. Endosperm initially but hypocotyl later on.

  2. Cotyledons

  3. Endosperm from the beginning

  4. Testa


Correct Option: B
Explanation:

1. Seed store reserve food for the use of embryo at the time of germination in their cotyledons or in endosperm.

2. The seeds, which store food materials in their cotyledons are called non- endospermic or exalbuminous seeds( e.g., Gram, Pea).
3. The seeds, which store food materials in endosperm are called  endospermic or albuminous seeds( e.g., Castor, Maize).
4. Testa- The outer coat of seed is called testa.
So, the correct answer is 'Cotyledons'.

In exalbuminous seeds, there is :

  1. Non formation of endosperm

  2. Abundant formation of endosperm

  3. Abundant protein

  4. Consumption of endosperm during development of speed


Correct Option: D
Explanation:

Seed store reserve food for the use of embryo at the time of germination in their cotyledons or in endosperm.

The seeds, which store food materials in their cotyledons are called non- endospermic or exalbuminous seeds( e.g., Gram, Pea).
The seeds, which store food materials in endosperm are called  endospermic or albuminous seeds( e.g., Castor, Maize).
So, the correct answer is 'Consumption of endosperm during development of embryo'.

Which is an albuminous seed?

  1. Gram

  2. Castor

  3. Maize

  4. Both B and C


Correct Option: D
Explanation:

The seed which store food materials in endosperm are called endospermic or albuminous seed.

A. Gram - Non albuminous seed.
B. Castor- Albuminous seed.
C. Maize- Albuminous seed.
So, the correct answer is 'Both B and C'.

Which one is monocot albuminous seed?

  1. Maize

  2. Wheat

  3. Rice

  4. All of the above


Correct Option: D
Explanation:

Seeds, which store food materials in their cotyledons are called non- endospermic or exalbuminous seeds.(e.g., Gram, Pea, Bean, Almond, Groundnut).

Seeds, which store food materials in their endosperm are called endospermic or albuminous seeds. (e.g., Castor, Maize, Wheat, Barley, Grasses).

Monocot seed- one cotyledon.

Dicot seed- Two cotyledons.

A. Maize- Monocot albuminous seed.

B. Wheat- Monocot albuminous seed.

C. Rice- Monocot albuminous seed.

So, the correct answer is 'All of the above'.

Aleurone layer takes part in

  1. Protein of delicate embryo

  2. Enzyme synthesis

  3. Transfer of food to cotyledons

  4. Transfer of food from cotyledons to embryo tips


Correct Option: B
Explanation:

In monocotyledonous endospermic seed, endosperm is surrounded by a special one- cell thick layer, called aleurone layer. Its main function is to nourish the embryo enclosed in the seed.It is protein rich coat formed by the outermost layer of endospermic cells. It actively secretes few enzymes which help in the process of seed germination.
So, the correct answer is 'Enzyme Synthesis'.

Non-albuminous seeds occur in

  1. Maize

  2. Wheat

  3. Rice

  4. Vallisneria


Correct Option: D
Explanation:

Seeds, which store food materials in their cotyledons are called non- endospermic or exalbuminous seeds.(e.g., gram, pea, bean, almond, groundnut, mustard, sunflower).

Seeds, which store food materials in their endosperm are called endospermic or albuminous seeds. (e.g., castor, maize, wheat, barley, grasses, rice).

Vallisneria is a genus of freshwater aquatic plant, commonly called eelgrass, tape grass or vallis.  It has a non albuminous seed.

So, the correct answer is 'Vallisneria'.

Seed of castor is

  1. Non-endospermic exalbuminous

  2. Endospermic albuminous

  3. Endospermic exalbuminous

  4. Non-endospermic albuminous


Correct Option: B
Explanation:

Seeds, which store food materials in their cotyledons are called non- endospermic or exalbuminous seeds.(e.g., Gram, Pea, Bean, Almond, Groundnut).

Seeds, which store food materials in their endosperm are called endospermic or albuminous seeds. (e.g., Castor, Maize, Wheat, Barley, Grasses).

So, the correct answer is 'Endospermic albuminous'.

Assign the seeds to their respective categories :
(a) Maize 
(b) Mustard
(c) Pea
(d) Endospermic
(e) Non endospermic

  1. a - d, b - d, c- e

  2. a - d, b - e, c- e

  3. a - e, b - e, c - d

  4. a - e, b - d, c - e


Correct Option: B
Explanation:

Seeds, which store food materials in their cotyledons are called non- endospermic or exalbuminous seeds.(e.g., Gram, Pea, Bean, Almond, Groundnut).

Seeds, which store food materials in their endosperm are called endospermic or albuminous seeds. (e.g., Castor, Maize, Wheat, Barley, Grasses).

(a) Maize- endospermic

(b) Mustard- Non- endospermic

(c) Pea- Non endospermic.

So, the correct answer is'a-d, b-e, c-e'.

Food is stored in albuminous seed in

  1. Testa

  2. Cotyledon

  3. Endosperm

  4. Plumule


Correct Option: C
Explanation:

A. Outer seed coat which ensures survival of seeds called testa.

B. Cotyledons reserve food material in exalbuminous seeds.
C. Endosperm reserve food in albuminous seeds.
D. Plumule gives rise to aerial shoot.
So, the correct answer is 'Endosperm'.

Seeds are non-endospermic in

  1. Gram

  2. Pea

  3. Bean

  4. All of the above


Correct Option: D
Explanation:

Seeds, which store food materials in their cotyledons are called non- endospermic or exalbuminous seeds. (e,g., gram, pea, bean, almond, groundnut).

Seeds, which store food materials in their endosperm are called endospermic or albuminous seeds. (e.g., castor, maize, wheat, barley, grasses). So, the correct answer is 'All of the above'.

Endosperm is consumed by the developing embryo in ____________.

  1. Coconut

  2. Pea

  3. Maize

  4. Castor


Correct Option: B
Explanation:

  • In most of the angiosperms, the endosperm by nature will be triploid. 
  • In some plants, the endosperm is completely consumed by the formation of zygote. 
  • In pea and groundnut, the endosperm is consumed by developing an embryo in the seed. 
  • The endosperm is completely absorbed by this growing embryo and hence food reserve gets stored in the cotyledons.
  • The correct option is B.

Albuminous seeds store their reserve food mainly in

  1. Cotyledons

  2. Hypocotyl

  3. Perisperm

  4. Endosperm


Correct Option: D
Explanation:

Seeds, which store food materials in their cotyledons are called non- endospermic or exalbuminous seeds.

Seeds, which store food materials in their endosperm are called endospermic or albuminous seeds.

A. Cotyledons- It store food material in exalbuminous seed.

B. Hypocotyl- The portion of axis between the radicle and cotyledonary node is called hypocotyl.

C. It is a persistent nucellus.

D. Endosperm- It store food material in albuminous seed.

So, the correct answer is 'Endosperm'.

Select the seeds that have separate endosperm.
(a) Maize (b) Onion (c) Rice (d) Bean

  1. a, b and c

  2. a and b

  3. b and d

  4. a and c


Correct Option: A
Explanation:

Seeds, which store food materials in their endosperm are called endospermic or albuminous seeds. (e.g., Castor, maize, wheat, barley, grasses, rice, onion).

Seeds, which store food materials in their cotyledons are called non- endospermic or exalbuminous seeds.(e.g., gram, pea, bean, almond, groundnut, mustard, sunflower).

So, the correct answer is 'a, b and c'.

Endosperm is completely consumed by the developing embryo in

  1. Pea, Bean and Groundnut

  2. Maize, Bean and Castor

  3. Maize, Pea and Groundnut

  4. Maize, Bean and Pea


Correct Option: A
Explanation:
In some plants, the endosperm is completely consumed by the growing embryo. Such seeds in which no endosperm is left are called exalbuminous or non-endospermous seeds.
Examples are Pea, Bean, Groundnut.
Whereas the seeds, in which endosperm is not completely consumed by the growing embryo and is persistent, are called albuminous or endospermous seeds. Examples are Maize and Castor.
So, the correct answer is A.

Which of the following is an example of a seed in which the endosperm is not completely consumed by the developing embryo?

  1. Gram

  2. Bean

  3. Castor

  4. Pea


Correct Option: C
Explanation:
Seeds in which endosperm is completely consumed by the growing embryo, are called exalbuminous or non endospermous seeds. Examples are Pea, Bean, Gram.
Seeds in which endosperm is not completely consumed by the growing embryo and is persistent, are called albuminous or endospermous seeds. Example is Castor.
So, the correct answer is C.

Perisperm differs from endosperm in.

  1. Its formation by fusion of secondary nucleus with several sperms

  2. Being a haploid tissue

  3. Having no reserve food

  4. Being a diploid tissue


Correct Option: D

Consider the following statements:
1. The seed of pea is albuminous.
2. The fruit of peach is drupe.
Which of the statements given above is/are correct?

  1. 1 only

  2. 2 only

  3. Both 1 and 2

  4. Neither 1 nor 2


Correct Option: A

Which of the following statements is not correct?

  1. In corn, the mature seed is exalbuminous

  2. In orchids, the embryo has no cotyledons

  3. In corn, the embryo contains young leaves while in the seed

  4. In peach, the fruit is drupe


Correct Option: A

Which of the following is false fruit?

  1. Groundnut

  2. Mustard, Mango

  3. Citrus

  4. Apple, strawberry


Correct Option: D

Endosperm is absent in

  1. Podostemonaceae

  2. Orchidaceae

  3. Trapaceae

  4. All the above


Correct Option: D
Explanation:
During double fertilization, the fusion of one sperm with the egg cell forms the embryo and that of the other sperm with a polar nucleus gives rise to the endosperm. The families that lack an endosperm include Orchidaceae, Podostemaceae, and Trapaceae.

So, the correct answer is 'All the above'.

The fleshy edible part of an apple is

  1. thalamus

  2. nucellus

  3. ovary

  4. endosperm


Correct Option: A
Explanation:

If a fruit is formed from any other part of the flower  than the ovary, then such a fruit is termed as false fruit. In apple the thallamus of the flower forms the edible part or the fruit.

So, the correct option is 'Option A'.

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