What adaptations do spongy mesophyll cells have?
The spongy mesophyll cells are covered by a thin layer of water. Gases dissolve in this water as they move into and out of the cells. When the plant is photosynthesising during the day, these features allow carbon dioxide to diffuse into the spongy mesophyll cells, and oxygen to diffuse out of them.
What is the main function of the spongy mesophyll?
In plants, it is part of the mesophyll, where it forms a layer next to the palisade cells in the leaf. The spongy mesophyll’s function is to allow for the interchange of gases (CO2) that are needed for photosynthesis.
Which plant tissue type forms a protective covering of the plant?
The dermal tissue system—the epidermis—is the outer protective layer of the primary plant body (the roots, stems, leaves, flowers, fruits, and seeds). The epidermis is usually one cell layer thick, and its cells lack chloroplasts.
What type of specialized tissue is found in the stem shoot *?
In stems, the vascular tissue is found in the vascular bundles. Phloem cells are hollow and nonliving, and they form a continuous pipeline that transports sugars. Xylem cells are hollow and nonliving, and they form a continuous pipeline that transports water and minerals.
What would be the advantage to having no chloroplasts in the cells of the spongy mesophyll?
What would be the advantages to having no chloroplasts in the cells of the spongy mesophyll? Fewer chloroplasts in the spongy mesophyll because most of the light energy is absorbed by the chloroplasts of the palisade mesophyll. Suppose there were many chloroplast in the cells of the upper epidermis.
What function do you think the palisade and spongy mesophyll tissues provide for the plant?
The cuticle and upper epidermis provide protection for the plant. Below that is the palisade layer, which is the location of photosynthesis within the leaf. Below the palisade layer is the spongy layer, which contains cells that are more spread out, allowing for air pockets.
How is the guard cell adapted for photosynthesis?
They would normally only close in the dark when no carbon dioxide is needed for photosynthesis. Guard cells are adapted to their function by allowing gas exchange and controlling water loss within the leaf.
Why is it useful to the plant to have air spaces around the spongy mesophyll cells in the leaves?
Intercellular air spaces within the spongy mesophyll layer – they allow the diffusion of carbon dioxide and oxygen. Stomata (small pores usually found on the lower surface of the leaf) – allow carbon dioxide and oxygen to enter and leave the leaf.
What plant tissue is responsible for transporting water and minerals?
xylem, plant vascular tissue that conveys water and dissolved minerals from the roots to the rest of the plant and also provides physical support. Xylem tissue consists of a variety of specialized, water-conducting cells known as tracheary elements.
Why epidermis is called protective tissue?
It acts as the first line of defence against various types of diseases and infections. It is the outer most layer i.e; it is the first layer of the plant body. It protects the other parts of the body from injuries, bacterial attacks etc.
What type of cell is collenchyma?
Collenchyma is a simple plant tissue, consisting of only one cell type. Collenchyma cells are elongated, living cells that occur especially in peripheral positions in leaves and stems of eudicotyledons where they provide mechanical support while they are still growing [1,2,3].
Where are collenchyma cells found?
Collenchyma is a supporting tissue characteristic of the growing organs of many herbaceous and woody plants, and it is also found in stems and leaves of mature herbaceous plants, including those that are only slightly modified by secondary growth.