Click to see full answer. In this manner, what are the adaptations of a leaf? Leaves have many adaptations: Large surface area - To absorb light. Thin - Short distance for diffusion of CO2. Chlorophyll - Absorbs sunlight. Veins - Support and transport of water and carbohydrates. Stomata - Allow CO2 to diffuse into leaf. Subsequently, question is, how is the cuticle adapted for photosynthesis? The leaf is the organ in a plant specially adapted for photosynthesis.
It produces a waxy layer, called the cuticle , which is not made of cells but is a waterproof barrier to prevent excessive evaporation through the hot upper surface of the leaf. The structures of leaves are adapted for efficient photosynthesis as shown in the table below. Most leaves are broad and so have a large surface area allowing them to absorb more light.
A thin shape means a short distance for carbon dioxide to diffuse in and oxygen to diffuse out easily. Leaves have a large surface area so more light hits them.
The palisade cells contain many chloroplasts which allow light to be converted into energy by the leaf. The leaf also has air spaces which allow better diffusion of carbon dioxide into the leaf. Leaves are adapted for photosynthesis and gaseous exchange. They are adapted for photosynthesis by having a large surface area, and contain openings, called stomata to allow carbon dioxide into the leaf and oxygen out.
Some of this water evaporates, and the water vapour can then escape from inside the leaf. What are the 3 types of adaptation? The three basic types of adaptations, based on how the genetic changes are expressed, are structural, physiological and behavioral adaptations.
Most organisms have combinations of all these types. What are some adaptations of plants? You need to understand the structure of the tissues in a leaf together with their functions. Upper Epidermis : this is the tissue on the upper surface of the leaf. It produces a waxy layer, called the cuticle, which is not made of cells but is a waterproof barrier to prevent excessive evaporation through the hot upper surface of the leaf.
The upper epidermis cells have no chloroplasts so light passes through them easily. The palisade cells have many chloroplasts in their cytoplasm and the box-like shape and arrangement of these cells ensures they are packed tightly together. Spongy Mesophyll : this tissue contains large air spaces which are linked to the atmosphere outside the leaf through microscopic pores called stomata on the lower surface. Spongy mesophyll cells also contain chloroplasts and photosynthesis occurs here too.
The air spaces reduce the distance carbon dioxide has to diffuse to get into the mesophyll cells and the fact that these cells have fairly thin cell walls which are coated with a film of water together means that gas exchange between air space and mesophyll is speeded up. Lower Epidermis is the most dull tissue in the leaf.
The only interesting thing about it is that it contains specialised cells called guard cells which enclose a pore called a stoma. Carbon dioxide can diffuse into the leaf through the stomata when they are open usually at day time and water evaporates out of the stomata in a process called transpiration. Adaptations of a Leaf for Photosynthesis. Could you explain this in simpler words? I thought it was between oxygen and carbon dioxide?
Leaf cells need carbon dioxide for the process of photosynthesis. Carbon dioxide is a gas found in air. So having air spaces in the leaf means that the air is closer to the leaf cells than if it had to move in from outside the leaf.
Gases like carbon dioxide move by a process called diffusion and diffusion is affected by distance — the greater the distance, the slower the diffusion. So air spaces in the leaf mean that carbon dioxide moves into leaf cells mesophyll cells faster than if there were no air spaces.
Diffusion of carbon dioxide is also speeded up if the gas exchange surface is moist ie lined with a film of water The reason for this is complicated but to keep it simple, diffusion can happen faster if the gas is dissolved in water. And finally you are right that gas exchange involves carbon dioxide moving one way into the leaf cells and oxygen moves the opposite way out of the leaf cells Hope this helps!
Umm I dont want to rush you but can u reply asap? I mean I dont want to rush you or offend u in anyway. Good luck with explaining this topic to other students — it is a tricky one…. This site is very useful and very helpful to me and i would recommend to anyone who finds biology hard. As well as that please can you tell me if DORIC is used frequently in other schools near you because, in my school, we have more traditionalists than liberalists.
Thanks for your comment. But the principles of how to carry out a valid and reproducible experiment are the same in every context. I hope this answers helps.
I am very pleased you and your teacher find this site useful. Please spread the word amongst your classmates as I want as many people as possible to be able to use my posts to help with their Biology. Leaves are adapted to perform their function, eg they have a large surface area to absorb sunlight. Plants have two different types of 'transport' tissue, xylem and phloem. These specialised tissues move substances in and around the plant. The function of a leaf is photosynthesis - to absorb light and carbon dioxide to produce glucose food.
The equation for photosynthesis is:. Leaves are also involved in gas exchange. Carbon dioxide enters the leaf and oxygen and water vapour leave the plant through the stomata.
Leaves are adapted in several ways to help them perform their functions. The internal structure of the leaf is also adapted to promote efficient photosynthesis.
When a plant is carrying out photosynthesis carbon dioxide needs to move from the air into the leaf. It does this by diffusing through small pores called stomata. At the same time oxygen moves out of the leaf through the stomata.
This movement of gases in opposite directions is called gas exchange. Water vapour also diffuses out of the stomata. The stomata are surrounded by guard cells, which control their opening and closing. Cells in the leaf are loosely packed. Light absorption happens in the palisade mesophyll tissue of the leaf.
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