NEET BIOLOGY

PLANT PHYSIOLOGY

PLANT GROWTH

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Red light
A
Causes plants to grow taller and thinner
B
has no effect on plant growth
C
is not a part of visible light
D
causes plants to grow thicker stems
Explanation: 

Detailed explanation-1: -It can greatly enhance the photosynthesis of plants and promote the growth of plants. but if plants are grown under only red light. They will have a stretched and elongated appearance. The leaves are long and thin and plants become tall.

Detailed explanation-2: -Red light on extension growth. Many plants grown under only red light, such as plants grown indoors under only red LEDs, have a stretched, elongated appearance; the leaves are thin and large and plants become tall.

Detailed explanation-3: -Red Light Spectrum (600–700 nm) In other words, it sits in the peaks in chlorophyll absorption. Red light wavelengths (particularly around 660nm) encourage stem, leaf, and general vegetative growth – but most commonly, tall, stretching of leaves and flowers.

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