The law of limiting factors was proposed with particular reference to photosynthesis. Identify the scientist who proposed this law.

Who proposed the "Law of Limiting Factors"?

The rate of photosynthesis is maximum in the $P$ region of light and minimum in the $Q$ region of light.

Light plays an important role in the life of all organisms. Name any three physiological processes in plants which are affected by light.

Which external factors affect plants?

Categorize the following factors affecting photosynthesis into internal and external factors:
$I-$ Light
$II-$ Temperature
$III-$ Age and size of leaf
$IV-$ Leaf orientation
$V-$ Mesophyll cells and chloroplasts
$VI-$ $CO_2$ concentration
$VII-$ Water
$VIII-$ Chlorophyll content
$IX-$ Internal $CO_2$ concentration
Identify the correct sequence for internal factors and external factors respectively.