Tag: botany

Quizzes (264) Questions (5276)

Questions Related to botany

Multiple choice botany unravelling genetic mysteries experiments of mendel mendel's law of inheritance works of mendel

Choose the correct answer from the alternatives given.

Among the seven pairs of contrasting traits in pea plant as studied by Mendel, the number of traits related to flower, pod, and seed respectively were

  1. 2, 2, 2

  2. 2, 2, 1

  3. 1, 2, 2

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

Mendel's seven traits were: flower color, flower position, stem height, pod shape, pod color, seed shape, and seed color. Categorizing these: flower (2), pod (2), and seed (2), with stem height as the remaining one.

Multiple choice botany unravelling genetic mysteries experiments of mendel mendel's law of inheritance works of mendel

Choose the correct answer from the alternatives given.


The colour based contrasting traits in seven contrasting pairs, studied by Mendel in pea plant were.

  1. 1

  2. 2

  3. 3

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

The colour based contrasting traits studied by Mender in pea plant were pod colour,  i.e., green (dominant) and yellow (recessive), flower colour, i.e., violet (dominant) and white (recessive) and seed colour, i.e., yellow (dominant) and green (recessive). 

Multiple choice botany plant breeding common modes of vegetative propagation plant breeding for food production tissue culture

To obtain seedless watermelon, which among the following method is followed?

  1. Apomixis

  2. Somatic hybridization

  3. Organogenesis

  4. Micropropagation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Isolated protoplasts from two different varieties of plants – each having a desirable character – can be fused to get hybrid protoplasts, which can be further grown to form a new plant. These hybrids are called somatic hybrids while the process is called somatic hybridization.
  • Protoplasts are used to produce variations in the morphology of leaves and flowers, ability/potential of the growth of the embryo, and enhancement of disease resistance in plants.
  • To obtain seedless watermelon, somatic hybridization methods are followed.
  • So, the correct answer is 'Somatic hybridization'.
Multiple choice botany plant breeding common modes of vegetative propagation plant breeding for food production tissue culture

Which of the following techniques are involved in the production of plant hybrids?

  1. Cybridisation

  2. tissue culture

  3. Emasculation

  4. Both A and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plant hybridization often involves emasculation (removing anthers to prevent self-pollination) and pollination. Cybridisation is a separate technique involving protoplast fusion.

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

The term 'totipotency' refers to the capacity of a 

  1. cell to generate whole plant

  2. bud to generate whole plant

  3. seed to germinate

  4. cell to enlarge in size
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The capacity to generate a whole new plant from any cell is called totipotency. That whole plant could be regenerated from explants ( any part of plant that taken out and grown under sterile conditions in a special nutritive media). 

So, the correct option is 'Option A' .

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

Micropropagation involves ____________________.

  1. Vegetative multiplication of plants by using microorganisms

  2. Vegetative multiplication of plants by using small explants

  3. Vegetative multiplication of plants by using micro-spores

  4. Non-vegetative multiplication of plants by using microspores and megaspores
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Micropropagation is the tissue culture technique used for rapid vegetative multiplication of ornamental plants and fruit trees by using small sized explants.

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

Which of the following problem does the frequent deep sea diver organism like whales may face?

  1. compression of tissue surrounding air filled cavities.

  2. High blood nitrogen levels

  3. Lack of oxygen

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Diving to depth can result in mechanical distortion and tissue compression, especially in gas-filled spaces of the body. Absorption of nitrogen into blood can cause high blood nitrogen levels which can exert amniotic effect. Lungs of the deep-diver cannot serve as a source of oxygen during the dive. 

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

An explant is

  1. dead plant

  2. part of the plant

  3. part of the plant used in tissue culture

  4. part of the plant that expresses a specific gene
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An explant is a part of the plant that taken out and grown in special nutritive media under sterile conditions. This is the process to generate a whole plant in tissue culture.

So, the correct option is 'Option C' .

Multiple choice botany tissue culture common modes of vegetative propagation plant breeding for food production plant tissue culture

Vegetative propagation through cell or tissue culture is known as

  1. Macropropagation

  2. Cloning

  3. Micropropagation

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

Micropropagation is culture of apical shoots, axillary buds and meristems on suitable nutrient medium to produce a genetically identical progeny. Macropropagation is production of progeny by means of conventional techniques including cuttings, air-layering and grafting. Production of genetically identical cell lineage or organisms is called as cloning. It includes both conventional and tissues culture techniques. Asexual propagation refers to production of progeny by single parent plant, it can occur through vegetative propagules (rhizome, tubers and bulb) or by artificial methods (cutting, and grafting).

Hence, the correct option is C.