Tag: biology

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Questions Related to biology

Multiple choice biology life processes guttation excretion in plants long distance transport of water

Waste products produced during respiration in plant is/are

  1. CO$ _{2}$

  2. Water

  3. Oxygen

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

  • Like animals, plants also respire all the time because their cells need energy, to stay alive, but plants can only photosynthesize when they are in the light. Photosynthesis happens in the chloroplasts of plant cells. 
  • It produces glucose for use by the plant, and oxygen as a waste product. Respiration uses oxygen and produces carbon dioxide and water as a waste product.

So, the correct answer is option D.

Multiple choice biology through the alimentary canal guttation excretion in plants long distance transport of water

The main waste products of plants are

  1. CO$ _2$ and NO$ _2$.
  2. CO$ _2$ and water vapour.
  3. CO$ _2$, O$ _2$ and water vapour.

  4. None of the above.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Plants eliminate some waste through diffusion. During the day, excess oxygen gas produced by photosynthesis is released through the stomata. Carbon dioxide produced by respiration is normally used up during photosynthesis. At night, however, as photosynthesis slows, carbon dioxide is not used up as fast as it is produced, and it is released as a waste product. Plants also release waste water by transpiration and guttation. 

Therefore, the correct answer is option C.

Multiple choice biology through the alimentary canal guttation excretion in plants long distance transport of water

Plants excrete gases through 

  1. Microscopic pores in leaves.

  2. Small porous roots.

  3. Flowers.

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

Plants eliminate some waste through diffusion. During the day, excess oxygen gas produced by photosynthesis is released through the stomata. Stomata are microscopic pores in leaves. Carbon dioxide produced by respiration is normally used up during photosynthesis. At night, however, as photosynthesis slows, carbon dioxide is not used up as fast as it is produced, and it is released as a waste product. Plants also produce oxygen as a by-product of photosynthesis. The oxygen that is not used for respiration is also excreted through the stomata. Plants do not excrete gases through flowers, roots and seeds. 

Therefore, the correct answer is option A.

Multiple choice biology life processes guttation excretion in plants long distance transport of water

Resin canals in Pinus are formed.

  1. By the separation of secretory cells

  2. By the destruction of secretory cells

  3. Partly by separation and partly by destruction of secretary cells

  4. By large intercellular spaces of the cortex of the stem
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Resin canals in Pinus are lysigenous or schizogenous in origin, but in the context of botanical anatomy, they are typically described as being formed by the separation of secretory cells (schizogenous).

Multiple choice biology breeding and biotechnology method of plant breeding for crop improvement plant breeding for food production biotechnology

Which of the following is a correct match between crop, variety and resistance to diseases?

  1. Crop - Wheat, Variety - Himgiri, Resistance to disease - White rust

  2. Crop - Brassica, Variety - Pusa Sadabahar, Resistance to disease - Black rot

  3. Crop - Cowpea, Variety - Pusa Komal, Resistance to disease - Bacterial blight

  4. Crop - Chilli, Variety - Pusa Swarnim, Resistance to disease - Chilly mosaic virus
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A)Crop - Wheat, Variety - Himgiri, Resistance to disease - Leaf and stripe rust, hill blunt.
B)Crop - Brassica, Variety - Pusa swarnim, Resistance to disease - White Dust
C)Crop - Cowpea, Variety - Pusa Komal, Resistance to disease - Bacterial Blight
D)Crop - Chilli, Variety - Pusa Sadabahar, Resistance to disease - Chilly mosaic virus
So the correct option is 'Crop - Cowpea, Variety - Pusa Komal, Resistance to disease - Bacterial blight'