Question | Answer |
A plant's response to gravity is called what? | gravitropism |
The flowering of a plant in response to change of light or dark is called what? | Phototropism |
A plant's response to length of day is called what? | Photoperiodism |
If a plant is turned to it's side, the leaves and branches will bend and grow up. This is what? | Phototropism |
If a plant is turned to its side, the leaves bend and grow up. This is what? | gravitropism |
If a plant is turned to its side the roots will bend and grow down. This is what | gravitropism |
If a plant is turned to its side the roots will bend and grow down. This is what? | phototropism |
Anything in the environment that effects the behavior of an organism is called a what? | Stimulus |
When an organism reacts to a stimulus it is a what | response |
what are responses of an organism to an external stimuli like gravity & sunlight? | tropism |
What are internal stimuli that cause plants to react; often only a gram needed? | Hormone |
What causes fast growth through rapid cell division? | cytokinins |
What is produced in cells of ripening fruit, which stimulates the ripening pocess.? | Ethylene |
What slows or stops plant growth? | Abscisic acid |
What causes cells to grow longer on the shaded side of the stem. | Auxin |
Because of the effect of auxins on cell growth, plant systems grow where? | toward light |
Plants that require less than 10-12 hours of darkness are called what? | long-day plants |
Plants that have no specific period and can flowering process can begin within a range of hours of darkness are called what? | Day Neutral plants |
Plants that require 12 or more hours of darkness are called what | Long day plants |
The stomata are located primarily in the what? | palisade layer |
Food is produced in the what? | Palisade layer |
What contains carbon dioxide and water needed for food production? | spongy layer |
What are cell structures where photosynthesis occurs? | Chloroplasts |
The breakdown of food releases what? | Energy |
What makes glucose and releases oxygen into the atmosphere? | Photosynthesis |
What breaks down food and releases energy? | respiration |
Photosynthesis uses _____, water, and light energy to produce glucose. | Carbon Dioxide |