Answer: They are made up of lipid bilayers. Furthermore, their main function is to enclose different structures of the cell regulating the passage of molecules through the membrane. Also, they act as semi-permeable membranes.
Explanation:
There are two types of succession that lead to the increasment of the ecosystem:
1. Primary succession is the change in the structure of an ecosystem represented with the increase of the ecological community on an area that has not been previously occupied by an ecological community such as area after the lava flow or glacial lake. The first organisms of primary succession are pioneer plants usually, lichens and mosses.
2. Secondary succession includes the step of removal of pre-existing community and after that, colonization of the new one.
A holdfast is a root-like structure that anchors aquatic sessile organisms, such as seaweed, other sessile algae, stalked crinoids, benthic cnidarians, and sponges, to the substrate.
Nanotechnology is in fact effective at helping clean up PCB’s or polychlorinated biphenyls and
similar compounds with the use of nanoparticles. Aside from this, it also <span>protect workers exposed to pesticides occupationally by regulating
pesticide use. </span>
<span>In addition, it reduces
the concentration of pesticides found in watersheds. Therefore, the answer is
A. only promote pesticide use in rural environment. </span>
