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Botany - 2 (B.Sc. Agriculture)

Description: Botany - 2
Number of Questions: 15
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Tags: Botany - 2 Crop Improvement Plant Diseases Genetically Modified Organisms Mutation Botanical Garden Fruit Binomial Nomenclature
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Consider the following statements:

  1. In ‘Bt cotton and Bt brinjal’, the common term ‘Bt’ refers to as Bacterial technique.
  2. The twins whose bodies are joined together at birth are called fratenal twins.

Which of the given statements is/are correct?

  1. Only (1)

  2. Only (2)

  3. Both (1) and (2)

  4. Neither (1) nor (2)


Correct Option: D
Explanation:

Statement (1) is incorrect. In ‘Bt cotton and Bt brinjal’, the common term ‘Bt’ refers to as Bacillus thuringiensis, a common soil bacterium. When Bt is placed before a plant name, such as in Bt Brinjal, it means the plant has been genetically modified to produce a protein toxic to certain insects in the same way the bacteria does. Statement (2) is also incorrect. The twins whose bodies are joined together at birth are called conjoined/ Siamese twins.

The biggest botanical garden in Asia is in

  1. Srinagar

  2. Mysore

  3. Calcutta

  4. Bangalore


Correct Option: C
Explanation:

The biggest botanical garden in Asia is in Calcutta.

Seed germination requires

  1. water

  2. oxygen

  3. Both 1 and 2

  4. carbon dioxide


Correct Option: C
Explanation:

 Seed germination requires both water and oxygen

Amitosis usually occurs in

  1. eukaryotic cells

  2. prokaryotic cells

  3. viruses

  4. All of the above


Correct Option: B
Explanation:

It is the simplest form of cell division without forming chromosomes and is usually seen in bacteria.

Weedicides are sprayed in the fields during the vegetative growth of weeds _________.

  1. before sowing seeds

  2. after flowering

  3. just before harvesting

  4. before flowering


Correct Option: D

In which of the following regions is plantation agriculture largely practiced?

  1. semi-arid

  2. subtropical

  3. tropical

  4. temperate


Correct Option: C

What is the mode of transmission of 'Yellow mosaic disease of okra'?

  1. Air

  2. Water

  3. Soil

  4. Insect


Correct Option: D
Explanation:

The mode of transmission of 'Yellow mosaic disease of okra' are insects. The mode of transmission of 'Yellow mosaic disease of okra' are insects.

Directions: Choose the appropriate answer from the options given below:

In Apples, the edible part is

  1. fleshy thalamus

  2. mesocarp

  3. pericarp

  4. placenta


Correct Option: A
Explanation:

Apple fruit is a pseudocarp with edible fleshy thalamus.

Helianthus annuus is the botanical name of

  1. Groundnut

  2. Sunflower

  3. Tea

  4. Hyacinth


Correct Option: B
Explanation:

Helianthus annuus is the botanical name of sunflower.

Which of the following fungi is found useful in the biological control of plant diseases?

  1. Penicillium notatum

  2. Phytophthora parasitica

  3. Mucor mucedo

  4. Trichoderma viride


Correct Option: B
Explanation:

Trichoderma sp. and Glioclodium fimbriatum are found in damp soils. They have an inhibitory effect on Pythium, which causes damping off disease of tobacco and chillies.

Which base is responsible for hot spots in spontaneous point mutation?

  1. Adenine

  2. Guanine

  3. 5-bromouracil

  4. 5-methylcytocine


Correct Option: C
Explanation:

5-Bromouracil (or 5-bromo-2,4(1H,3H)-pyrimidinedione or 5-BrU or 5-BU) is a brominated derivative of uracil that acts as an antimetabolite or base analog, substituting for thymine in DNA, and can induce DNA mutation

Centromeres line up in the equator during

  1. prophase

  2. metaphase

  3. anaphase

  4. telophase


Correct Option: B
Explanation:

 Centromeres line up in the equator during metaphase.Metaphase is the third phase of mitosis, the process that separates duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells.

_______ is used for the reclamation of acidic soil.

  1. Lime

  2. Rice

  3. Sodium

  4. Calcium


Correct Option: A

The Union Environment Ministry announced a moratorium on the release of the transgenic Bt brinjal. Indian subsidiary of which global seeds company has developed Bt brinjal?

  1. Pioneer Hi-Bred

  2. Monsanto

  3. Syngenta

  4. Cargill

  5. Celera Genomics


Correct Option: B
Explanation:

  Indian subsidiary of Monsanto company of global seeds has developed Bt brinjal.

Which among the following is a mixed fertilizer?

  1. Urea

  2. CAM

  3. NPK

  4. Ammonium Sulphate


Correct Option: A
Explanation:

 Urea ia a mixed fertilizer.

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