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Stomata are tiny pores present on the surface of the leaves via which exchange of gases takes place in the leaves for the purpose of photosynthesis. However, exchange of gases also occurs across the surface of stems, roots and leaves as well. Since large amounts of water can also be lost through these stomata, the plant closes these pores when it does not need carbon dioxide for photosynthesis. Hence, option B is correct.
The force required to maintain an object at a constant velocity is
A ______ is a passive two-terminal electrical component that implements electrical resistance as a circuit element.
Which of the following acids is present in an ant’s string?
Non-vascular plants do not contain:
What is the name of the reaction in which acid reacts with base to form salt and water?
While cooking, if the bottom of the vessel is getting blackened on the outside, it means that
Which of the following foods is a rich source of omega-3 fatty acids?
What is the work done when a force of 20 N moves an object 5 meters?
Zero group was introduced by
A magnetic force does no work on a moving charged particle because: