Tag: seeds

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Multiple choice botany seeds - structure and germination what is a seed? seeds seed

________ is not an endospermic seed.

  1. Pea

  2. Castor

  3. Maize

  4. Wheat
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Endosperm represents the food storing tissue of a seed. It is produced as a result of double fertilisation in angiosperms. In most monocots and some dicot seeds, the food reserve remains in the endosperm. They are called endospermic or albuminous seeds, e.g., maize, wheat, castor bean, coconut, barley, rubber. However, in the majority of dicot seeds(e.g., orchids, Sagittaria), the endosperm is consumed during seed development and the food is stored in cotyledons and other regions. They are called non endospermic or exalbuminous seeds.

So, the correct answer is 'Pea'.

Multiple choice botany seeds - structure and germination what is a seed? seeds seed

Stratification refers to a process in which seeds are subjected to a.

  1. Low temperature treatment

  2. Hormonal spray

  3. High temperature treatment

  4. Strong mutagen sign chemical treatment
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Stratification is a horticultural practice of exposing seeds to cold, moist conditions to simulate winter and break physiological dormancy, allowing them to germinate.

Multiple choice botany seeds - structure and germination what is a seed? seeds seed

Which one of the following pairs is not correctly matched?

  1. Morphine-Opium poppy

  2. Atropine- Black nightshade

  3. Quinine- Cocoa leaves

  4. Caffeine- Tea leaves
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Quinine is an anti-malarial drug extracted from the bark of the Cinchona tree, not from cocoa leaves. Morphine from opium poppy, atropine from black nightshade, and caffeine from tea leaves are correctly matched.

Multiple choice botany seeds - structure and germination what is a seed? seeds seed

An example of a seed with endosperm, perisperm and car uncle is -

  1. Castor

  2. Cotton

  3. Coffee

  4. Lily
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Castor seeds (Ricinus communis) are albuminous (endospermic) and possess a perisperm (remnant of nucellus) and a caruncle (a fleshy outgrowth near the hilum).

Multiple choice botany seeds - structure and germination what is a seed? seeds seed

In which of the following fruits, a multicarpellary ovary is not found?

  1. Apple

  2. Coconut

  3. Fig

  4. Guava
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Apple developes from inferior ovary. It has soft mesocarp and coratious endocarp.
The coconut is a drupe, a multicarpellary ovary is not found  in coconut. The mesocarp is fibrous or dry (termed a husk), so this type of fruit is classified as a simple dry fruit, fibrous drupe. Unlike other drupes, the coconut seed is unlikely to be dispersed by being swallowed by fauna, due to its large size. It can, however, float extremely long distances across oceans.
Fig is multiple fruit known as synconium type of fruit. It is fleshy, formed from entire inflorescence lined inside with numerous female flowers, each forming tiny one seeded drupelet.
In a guava entire pericarp is fleshy, although skin is rough sometimes, many seeded. It is a berry type of fleshy fruit.
Thus, the correct answer is option B.

Multiple choice botany seeds - structure and germination what is a seed? seeds seed

Which among the following is not a true tree?

  1. Coconut (Cocus nucifera)

  2. Peepal (Ficus religiosa)

  3. Mango (Mangifera indica)

  4. Banyan (Ficus benghalensis)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Botanically, the coconut palm is not a tree since there is no bark, no branches, or secondary growth. A coconut palm is a woody perennial monocotyledon with the trunk being the stem.

Multiple choice botany seeds - structure and germination what is a seed? seeds seed

Assertion: Maize is an albuminous seed.
Reason: Endosperm is completely absorbed by its growing embryo.

  1. If both A and R are true and R is correct explanation of A.

  2. If both A and R are true but R is not correct explanation of A.

  3. If A is true and R is wrong.

  4. If both A and R are wrong.

  5. If A is wrong and R is true.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The assertion is correct but the reason for the assertion is not right. Maize is an albuminous seed. The seeds are endospermic or albuminous where the embryo is embedded in the endosperm and nucellus, which the seedling will use upon germination. In maize the pericarp of the fruit is fused with the seed coat referred to as caryopsis. The cob is close to a multiple fruit in structure, except that the individual fruits -the kernels never fuse into a single mass. The grains are about the size of peas, and adhere in regular rows around a white, pithy substance, which forms the ear.
Therefore, the correct answer is option C.

Multiple choice botany seeds - structure and germination what is a seed? seeds seed

Choose the correct match out of the following.

   List I    List II
 A  Exalbuminous seed  1  Hypocotyl grows faster
 B  Epigeal germination  2  Endospermic seed
 C  Albuminous seed  3  Non-endospermic seed
 D  Hypogeal germination  4  Epicotyl grows faster

  1. A-3, B- 1, C- 2, D- 4

  2. A- 1, B- 2, C- 3, D- 4

  3. A- 2, B- 4, C- 1, D- 3

  4. A- 1, B- 4, C- 3, C- 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Seeds that possess a special food storage tissue called as the endosperm are said to be albuminous and those which have no such tissue for storage are said to be exalbuminous or non-endospermic. In albuminous seeds, food is being stored in endosperm the cotyledons are small and thin while on exalbuminous seeds cotyledon store up food and become thick and fleshy. When germination of seed takes place then food is used by embryo whether it is stored in endosperm or in cotyledon. Epigeal germination implies that the cotyledons are pushed above ground. The hypocotyl (part of the stem below the cotyledon) grows, while the epicotyl (part of the stem above the cotyledon) stays the same length. In this way, the hypocotyl pushes the cotyledon upward. Hypogeal germination implies that the cotyledons stay below the ground. The epicotyl grows, while the hypocotyl stays the same length. In this way, the epicotyl pushes the plumule above the ground. 

Multiple choice botany seeds - structure and germination what is a seed? seeds seed

Which of the following plant's seeds are used as 'Jeweller's weight'?

  1. Cajanus cajan

  2. Lens culinaris

  3. Glycine max

  4. Abrus precatorius
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Rosary pea (Abrus precatorius) is a slender, perennial climber, that twines around trees, shrubs, and hedges. It is a legume with alternate compound leaves, 2 to 5 inches long, with 5 to 15 pairs of oblong leaflets. 

A key characteristic in identifying rosary pea is the lack of a terminal leaflet on the compound leaves. The plant is best known for its seeds, which are used as beads in native jewelry, as well as in percussion instruments. Necklaces and other ornaments made from the seeds are worn by both children and adults. The red variety with black eye is the most common coloring for the seeds, but there are black, white and green varieties as well. These seeds are toxic due to the presence of abrin. The outer shell of the seed protects the contents from the stomachs of most mammals. Formerly Indians used these seeds to weigh gold using a measure called as 'Ratti'.

Multiple choice botany seeds - structure and germination what is a seed? seeds seed

Cotyledons and testa respectively are edible parts in

  1. French bean and coconut

  2. Cashew nut and litchi

  3. Groundnut and pomegranate

  4. Walnut and tamarind
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The edible parts of the seeds mentioned are as follows,
French Bean- cotyledons, Coconut - endosperm, testa, cotyledon and embryo
cashew nut - cotyledon, litchi - juicy aril,
groundnut - seeds, pomegranate - testa,
walnut - cotyledons, tamarind - mesocarp,
Therefore, the correct answer is option A.