Tag: botany

Quizzes (264) Questions (5276)

Questions Related to botany

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

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

  1. Plumule

  2. Cotyledon

  3. Endosperm

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

In monocot seeds like wheat or maize, the scutellum is a modified cotyledon that serves to absorb nutrients from the endosperm for the developing embryo.

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

A dicot plant lacking cotyledons is

  1. <p>Cuscuta</p>

  2. <p>Santalum</p>

  3. <p>Lodoicea</p>

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

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

  1. One, two and two

  2. Two, two and one

  3. Two, one and two

  4. One, two and one
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

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

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?

  1. $1$ and $2$
  2. $2$ and $3$
  3. $1$ and $4$
  4. $3$ and $4$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Orchids are indeed monocotyledonous plants and many tropical orchids grow as epiphytes on tree trunks for sunlight. However, they have immense ecological and medicinal value beyond just ornamentation, and some orchids (like certain mycoheterotrophic species) are not fully autotrophic.

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

Development of seed from an unfertilized egg is?

  1. Vivipary

  2. Parthenocarpy

  3. Apogamy

  4. Apospory
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Apogamy is the development of an embryo from a cell other than the egg cell (like synergids or antipodals) without fertilization. Parthenocarpy refers to fruit development without fertilization, and vivipary is seed germination while still attached to the parent plant.

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

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?

  1. Inbred lines

  2. Back-cross progeny

  3. Male sterile lines

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

Inbred lines are genetically uniform and stable. By using inbred lines, farmers can save seeds for subsequent seasons, avoiding the need to purchase expensive F1 hybrid seeds every year, which lose their vigor in the F2 generation.

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

Polyembryony commonly occurs in.

  1. Banana

  2. Tomato

  3. Potato

  4. Citrus
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Synthetic seeds are produced by.

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Synthetic seeds are created by encapsulating somatic embryos in a protective, nutrient-rich hydrogel, such as sodium alginate, to facilitate handling and storage.