Tag: seeds

Questions Related to seeds

The scutellum observed in a gram of wheat or maize is comparable to which part of the seed in other monocotyledons?

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

  1. Plumule

  2. Cotyledon

  3. Endosperm

  4. Aleurone layer

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Correct Option: B

A dicot plant lacking cotyledons is

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

  1. Cuscuta

  2. Santalum

  3. Lodoicea

  4. None of the above

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Correct Option: A
Explanation:

 A. Cuscuta- Dodder is parasitic on a very wide variety of plants, including a number of agricultural and horticultural crop species, such as alfalfa, lespedeza. It has no cotyledons.

B. Santalum is a genus of woody flowering plants, the best known and commercially valuable of which is the Indian sandalwood tree. It has two cotyledons.

C. Lodoicea, commonly known as the sea coconut, it has one cotyledons.

So, the correct answer is 'Cuscuta'.

In pea, castor and maize, the number of cotyledons are respectively

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

  1. One, two and two

  2. Two, two and one

  3. Two, one and two

  4. One, two and one

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Correct Option: B
Explanation:

Monocots seed- one cotyledons.

Dicot seed- two cotyledons.
Pea- dicot seed
Castor- dicot seed
Maize- monocot seed
So, the correct answer is 'Two, Two and One'.

Dormancy caused by seed coat impermeability to water and gases can be broken by ______________.

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

  1. Stratification

  2. Scarification

  3. Low temperature

  4. Abscises acid

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Correct Option: A

Consider the following statements.
a. Orchids are monocotyledonous plants
b. Orchids have only ornamental value
c. All orchids are autotrophs
d. Some orchids are epiphytes
Which of these statements are correct?

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

  1. $1$ and $2$

  2. $2$ and $3$

  3. $1$ and $4$

  4. $3$ and $4$

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Correct Option: A

Development of seed from an unfertilized egg is?

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

  1. Vivipary

  2. Parthenocarpy

  3. Apogamy

  4. Apospory

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Correct Option: C

Mohologically, the spice-yielding part of turmeric is?

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

  1. Seed

  2. Root

  3. Dried fruit

  4. Rhizome

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Correct Option: A

In view of the suicides committed by the poor farmers towards raising the commercial $F1$ hybrid seeds, a plant breeder wishes to supply them the hybrid seeds at a chapter cost. Which One of the following type of genetic stocks can be choose?

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

  1. Inbred lines

  2. Back-cross progeny

  3. Male sterile lines

  4. Pedigree lines

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Correct Option: A

Polyembryony commonly occurs in.

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

  1. Banana

  2. Tomato

  3. Potato

  4. Citrus

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Correct Option: D
Explanation:

Polyembryony refers to the phenomenon of having more than one embryo in the same seed. In Citrus, a seed has $2-40$ embryos, one normal embryo and the rest adventitive embryos(mostly nucellar). In adventitive embryony, an embryo develops directly from a diploid cell other than egg like that of nucellus and integument, e.g., Citrus, Opuntia.

Synthetic seeds are produced by.

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

  1. Encapsulating somatic embryos

  2. Encapsulating zygotic embryos in artificial nutrient jelly

  3. Encapsulating genetically engineered embryos

  4. Transplanting zygotic embryos of one plant in the endosperm of a related plant

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Correct Option: A