Tag: evs

Quizzes (439) Questions (4580)

Questions Related to evs

Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods

Dispersal of seed in Opium or Poppy/Argemone occurs by

  1. Explosive mechanism

  2. Parachute mechanism

  3. Censer mechanism

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

Dispersal of seeds in poppy occurs by censer mechanism. In this mechanism, the seeds are scattered after dehiscence of fruit occur when it is shaken by the wind. 

Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods

The seeds of poppy are dispersed by

  1. Wind

  2. Animals

  3. Water

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

In pollination, pollinators play a major role and different plants adopt different methods to pollinate themselves.

  1. By wind also called anemophily and is used by around 19% of plants. Ex poppy and palm.
  2. By animals also called zoophily in which various animals mainly insects help in pollination and get a reward for this. Majority of plant use this method around 80%.ex Sunflower (by bees), potato (by bumblebees).
  3. By water also called as hydrophily and is not used as much only 0.4 % of plant favored it. Ex Vallisneria.
  4. Explosion mechanism occurs when the triggering agent come in contact and is a violent explosion in which either only anther or both anther and stigma burst to release pollen. Ex Lamiaceae family.
So the correct option is "Wind".

Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods

Which of the following is a seed borne disease

  1. Bacterial blight of rice

  2. Kharia of paddy

  3. Whiptail of Brassica

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

Bacterial blight of rice is a seed borne disease which is transmitted to paddy. Seedlings when raised under high humid conditions. This disease is caused by Xanthomonas oryzae.

Multiple choice evs the journey of seeds vegetative propagation and seed dispersal seed dispersal seed dispersal and its methods

Which of the following is correct chronological order of the division taking place through an apical or embryo cell to a sixteen cell stage?

  1. Vertical division $\rightarrow$ Transverse division $\rightarrow$ Division at right angles to both the previous divisions $\rightarrow$ periclinal division
  2. Vertical division $\rightarrow$ Vertical division at right angles to the first division $\rightarrow$ Division at right angles to both the previous divisions $\rightarrow$ Periclinal divisions
  3. Vertical division $\rightarrow$ Transverse division $\rightarrow$ Periclinal division
  4. Vertical division $\rightarrow$ Vertical division at right angles to the first divisions $\rightarrow$ Transverse division $\rightarrow$ Periclinal division
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The development of the proembryo typically follows a specific sequence: initial vertical divisions, followed by transverse divisions, and then periclinal divisions to differentiate the layers.

Multiple choice evs receding water table water resources and conservation water conservation and irrigation water a precious resource

How is water conserved when evaporation is reduced?

  1. Low temperature

  2. Low wind speed

  3. Both (A) and (B)

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

Evaporation is a physical process influenced by environmental conditions. Lower temperatures reduce the kinetic energy of water molecules, and lower wind speeds reduce the rate at which water vapor is carried away from the surface.

Multiple choice evs receding water table water resources and conservation water conservation and irrigation water a precious resource

Which one is not a beneficial effect of water conservation?

  1. Reduction in water loss

  2. Reduction in water fall

  3. Reduction in waste of resources

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water conservation aims to reduce waste and loss. A reduction in 'water fall' (precipitation) is a natural climatic event, not a beneficial effect of human water conservation efforts.

Multiple choice evs when there is a disaster disaster and its types disaster and types disasters

Among these which of the following is a man made disaster?

  1. Radioactive radiations

  2. Mutations

  3. Industrial accidents

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Industrial accidents are caused by human error, negligence, or mechanical failure in industrial settings, making them man-made disasters. Radioactive radiations and mutations are often consequences of such accidents or other human activities.

Multiple choice evs when there is a disaster disaster and its types disaster and types disasters

Manmade disasters are mainly caused by

  1. Mishandling of chemicals in industries

  2. Biowars

  3. Flood

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

Man-made or anthropogenic disasters are caused by human error, negligence, or technological failures, such as industrial accidents, chemical spills, and nuclear leaks. Floods are primarily natural disasters, though human activities can exacerbate them.