What is the role of veins in the leaves during photosynthesis?
They contain chlorophyll that traps sunlight and give plants their green color. That energy from the sunlight is used to combine water and carbon dioxide from the air. The plant then converts that into sugar and oxygen. Veins in the leaves, called phloem, carry the sugars to all of the parts of the plant.
Why would the location and arrangement of these cells be advantageous to light absorption?
Given that they are located beneath the upper epidermis, palisade cells are well positioned to absorb light required for photosynthesis. In addition, their location ensures that carbon dioxide required for photosynthesis does not have to travel a long distance to reach the chloroplast.
How does having cell walls help a leaf to absorb as much energy as possible?
How does having cells with walls help a leaf to absorb as much energy as possible? Cell walls give the leaves support so the leaf can be in a position to capture as much sunlight as possible.
What is the purpose of having a watertight covering?
What is the purpose of having a water tight covering? The waxy cuticle keeps water inside the leaf cells. the water is then used for photosynthesis.
Which light is absorbed more by chlorophyll A?
Chlorophyll a is a specific form of chlorophyll used in oxygenic photosynthesis. It absorbs most energy from wavelengths of violet-blue and orange-red light.
What is the function of the stoma in a leaf?
The stomata control gas exchange in the leaf. Each stoma can be open or closed, depending on how turgid its guard cells are. Diffusion of carbon dioxide into the leaf for photosynthesis and oxygen and water vapour out of the leaf, is greatest when the stomata are open during the day.
What is the main function of the main vein of a leaf?
Veins provide support for the leaf and transport both water and minerals (via xylem) and food energy (via phloem) through theleaf and on to the rest of the plant.
What is the function of petiole in a leaf?
A petiole attaches the leaf to the stem and contains vascular tissue that provides a connection from the stem to permit sap to enter the leaf and the products of photosynthesis (carbohydrates) to be transported from the leaf to the rest of the plant.
Which of the following is function of the veins of leaf?
Vein provides rigidity to the leaf blade, acts as channels of transport for water, minerals and food materials.
Why chlorophyll absorbs blue and red light?
So they reject wavelengths at blue and red, thus appear purple. Now later when the proto-cyano and cyanobacteria came along, they evolved chloroplasts that used the wavelengths left over (mainly blue then red) so as to not compete with the majority. Therefore they absorb blue and red and reflect green, hence are green.
Which Colour of light is maximum absorbed by chlorophyll A?
Blue
Option C: Blue: The chlorophyll a absorbs blue light maximum but the photosynthesis is maximum in red light.
Which wavelength of light is best absorbed?
All organisms that conduct photosynthesis have carotenoids. They absorb green light between 460 nm and 550 nm best.
Which components of light are absorbed by chlorophyll?
Absorption spectra of the chlorophyll a and b pigments in the visible light range, measured in a solvent. Both types barely absorb green light. Chlorophyll a absorbs violet and orange light the most. Chlorophyll b absorbs mostly blue and yellow light.
Which substance is both entering and exiting the leaf?
Water
Which substance is both entering and leaving? Water. 4. Veins are important structures that carry materials through the leaf.
What is entering the leaf and what is exiting the leaf?
The raw materials of photosynthesis, water and carbon dioxide, enter the cells of the leaf. Oxygen, a by-product of photosynthesis, and water vapor exit the leaf. In most land plants, water enters the roots and is transported up to the leaves through specialized cells known as xylem (pronounced zigh-lem).
