Normal plant development (such as the straightening of the apical hook in a germinating seedling) in the presence of light is called

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Photomorphogenesis refers to the normal plant developmental processes that occur in response to light. This includes the straightening of the apical hook in a germinating seedling. Senescence refers to the aging and deterioration of plant tissues, thigmotropism refers to the growth response of a plant to touch or physical contact, phototropism refers to the directional growth response of a plant towards or away from a light source, and gravitropism refers to the growth response of a plant in relation to gravity.

Normal Plant Development (Such as the Straightening of the Apical