Describe an experiment to show that
Shoots are positively phototrophic.​

A well-watered potted plant is placed inside the box. If the window is kept closed for about 24 hours the plant shows normal growth. If the window is kept open, it is found after two days that the shoot tip bends and grows towards light proving that it is positively phototropic.

Explanation:

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they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.