The DERMIS, especially the deep reticular layer of dermis, is composed of DENSE IRREGULAR connective tissue.
Dense regular connective tissue is composed of tightly wound fibers of collagen, mainly found in tendons and ligaments.
The plasma membrane of the sea urchin egg has receptor molecules that are specific for binding acrosomal proteins .
<h3>What is plasma membrane ?</h3>
Plasma membrane is the outermost covering of the body which selectively permits the entry and exit of different type of materials .
Thus ,it is also called as selectively permeable membrane.it also separates the inner and outer environment of the cell .
It also helps in the diffusion process .
<h3>What are sea urchins ?</h3>
Sea urchins belongs to the animalia kingdom , Echinodermata Phylum, and Echinoidea class . they are small marine animals .Sea urchins are spiny , globular .
Learn more about sea urchins here :
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<span>They are Carbohydrates.</span>
Sycamore trees (Platanus occidentalis) make handsome shade trees for large landscapes.
An example of biodiversity is a greater variety of genes and species
