HORTICULTURE SCIENCE
ULTRA STRUCTURE OF PLANT CELLS AND ORGANS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
The term heliotropism comes from Greek words meaning “turning to face the Sun, “ which is exactly what many plants, such as sunflowers, do. Scientists have found that heliotropic flowers stay warmer and remain open longer than other types of flowers. How does heliotropism most likely help the sunflower?
|
|
It allows the flower to be visited by more insects and have higher rates of pollination.
|
|
|
It causes the flower to produce more ovules and pollen than it normally would.
|
|
|
It causes the plant to grow faster and taller in short periods of time.
|
|
|
It allows the plant to conduct photosynthesis at a much faster rate.
|
Explanation:
Detailed explanation-1: -Heliotropism is a scientific term for a plant’s tendency to turn toward the sun. Sunflowers are well-known for their heliotropism-they move in the sun’s direction over the course of a day, tracking it across the sky. Have you ever noticed a house plant growing in the direction of a window?
Detailed explanation-2: -Flowers which we can actually see move to track the sun are heliotropic, such as sunflowers, buttercups, artic poppies, and ranunculus adoneus. HOW DOES IT WORK? Phototropic flowers, like human eyes, use sensitive photoreceptors to pick up on the sun’s changing intensity.
There is 1 question to complete.