The bark of a tree is impervious to gases and water because bark cells are dead cells of the epidermis and compactly arranged without intercellular spaces. They contain a chemical called suberin in their walls that make them impervious to gases and water and it doesn't allow gases or water into the tree as bark cells are in the bark outer most layer of the tree.
Atria is a large part of the heart so too big for cells; arteries & veins lead away or to the heart.
Capillaries are the smallest vascular structures that allow materials to be exchanged easily between cells.
A rainforest plant would be least affected by the loss of guard cell function that closes the stomata.
<h3>What is Guard Cells?</h3>
Guard cells are types of specialized plant cells present in the epidermis of leaves, stems, and other organs that are used to control gas exchange.
They are produced in pairs with a gap between them that forms the stomatal pore. They are kidney-shaped cells that surround stomata and control the opening and closing of stomata.
When there is an excess of water in the plant, the guard cells swell and form a hole for the exchange of gases.
Thus, a rainforest plant would be least affected by the loss of guard cell function that closes the stomata.
Learn more about Guard cells, here:
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Genotype of heterozygous purple plant is: Pp
Cross = Pp × Pp
Offspring: = PP, Pp, Pp, pp
Pp, PP and pp is your answer
:D hope it helps
Sedimentary rocks form when sediments come together and forms the rocks, while metamorphic rock are those formed when sedimentary and igneous rocks compress under great heat and pressure.
