These questions will help you prepare for the lesson quiz. Be sure to read the feedback carefully for any questions you answer incorrectly, and review those topics before leaving this lesson and taking the quiz.
What is a phytochrome?
- a chemical that senses light
- the length of time that a plant is exposed to darkness
- a part of the year that has a unique amount of daylight or precipitation
- a plant that doesn't uses temperature to signal it when to bloom
A plant would not be able to tell how dark it is without phytochromes.
A plant would not be able to tell how dark it is without phytochromes.
A plant would not be able to tell how dark it is without phytochromes.
A plant would not be able to tell how dark it is without phytochromes.
Which term describes a plant that blooms only when exposed to an amount of light greater than its photoperiod?
- seasonal
- neutral
- long-day
- phytochromic
A photoperiod is the amount of darkness a plant is exposed to in a 24-hour period.
A photoperiod is the amount of darkness a plant is exposed to in a 24-hour period.
A photoperiod is the amount of darkness a plant is exposed to in a 24-hour period.
A photoperiod is the amount of darkness a plant is exposed to in a 24-hour period.
The absence of which chemical is mostly responsible for abscission?
- nitrogen
- carotenoids
- phytochromes
- chlorophyll
Plants shed their leaves when it's not possible for them to do much photosynthesis.
Plants shed their leaves when it's not possible for them to do much photosynthesis.
Plants shed their leaves when it's not possible for them to do much photosynthesis.
Plants shed their leaves when it's not possible for them to do much photosynthesis.
What is dormancy?
- a period of decreased growth in plants
- a period of darkness measured by phytochromes
- the process in which leaves age
- the process in which plants drop leaves and stems
A common definition of the word dormant is "to go to sleep."
A common definition of the word dormant is "to go to sleep."
A common definition of the word dormant is "to go to sleep."
A common definition of the word "dormant" is "to go to sleep."
What term describes a part of the year that has a unique amount of daylight or precipitation?
- solstice
- season
- photoperiod
- dormancy
The Earth's revolution around the sun causes different areas of the Earth to get different amounts of light over the course of a year.
The Earth's revolution around the sun causes different areas of the Earth to get different amounts of light over the course of a year.
The Earth's revolution around the sun causes different areas of the Earth to get different amounts of light over the course of a year.
The Earth's revolution around the sun causes different areas of the Earth to get different amounts of light over the course of a year.
Which type of dormancy results when a plant prepares for a change in the seasons?
- consequential
- phytochromic
- predictive
- senescence
If a plant prepares for a change, it gets ready for something it knows is going to happen.
If a plant prepares for a change, it gets ready for something it knows is going to happen.
If a plant prepares for a change, it gets ready for something it knows is going to happen.
If a plant prepares for a change, it gets ready for something it knows is going to happen.
Summary
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