A Protein Pigment Called Phytochrome Is Thought to Monitor Photoperiod

question 83

Multiple Choice

A protein pigment called phytochrome is thought to monitor photoperiod because

• A) it is converted between two forms by specific wavelengths of light.
• B) it absorbs red light and breaks down in darkness.
• C) the photoperiod response depends on how much light it absorbs.
• D) in darkness the pigment becomes inactive.
• E) the pigment response can be observed only in intact living plants.

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Definitions:

Manipulative

Relating to or characteristic of manipulating others for one's own advantage, often in a deceitful or unfair way.

Attachment

An emotional bond that develops between infants and their caregivers, influencing the child's social and emotional development.

Secure

A state or feeling of being free from danger or threats, often relating to emotional or physical safety.

Responsive

Being reactive or sensitive to stimuli or changes, often referring to the ability to respond quickly or positively to communications or needs.