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#### In each of the following situations what happens to the rate of photosynthesis? (a) Cloudy days (b) No rainfall in the area (c) Good manuring in the area (d) Stomata get blocked due to dust

Ans.
Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy.
It is a multi-step process that requires sunlight, carbon dioxide, and water as substrates.
Summary of Photosynthesis in equation form
$6CO_{2}+12H_{2}O+Chlorophyll+Sunlight \rightarrow C_{6}H_{12}O_{6}+6O_{2}+6H_{2}O$

(a) Cloudy days: The rate of photosynthesis decreases as the sunlight is low.
As the intensity of light decreases, the rate of light-dependent reactions of photosynthesis and in turn, the rate of
photosynthesis decreases.

(b) No rainfall in the area: The rate of photosynthesis decreases as the water is needed for photosynthesis. which gets broken into oxygen and hydrogen which later converts in to carbohydrates.

(c) Good Manuring in the area: The rate of photosynthesis increases as plants need raw minerals such as Fe, N, Mg, P….etc. for building their body and manuring increases raw minerals which further increases the rate of photosynthesis.

(d)$CO_{2}$ gas enters the leaves through stomata. If stomata get blocked due to dust, $CO_{2}$ gets blocked and hence rate of   photosynthesis decreases.