Answer:
<u>Dichotomous keys help evolutionary biologist because dichotomous keys consist of series of statement which provide choices and act as scientific tool that helps to identify the unknown organisms of different family. These keys are mostly used to identify species of plants and animals based on their characteristics so that these species could be categorized into particular groups.</u>
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Xylem tissue is composed of vessel cells and tracheids. Vessel cells lack end walls and join to form long tubes. Tracheids are slender cells with over lapping ends. This structure enables it to give support to the tree as well as moves water to aerial parts.
Answer:
Cellulose gives strength to cell.
Explanation:
Cellulose is a type of polysaccharide which is present in the cell wall of plant. It provides strength to the cell. It also helps in the absorption of water molecules from the surrounding environment.
Cellulose is composed of 44.44% of carbon atom, 6.17% hydrogen atom, and 49.39% oxygen atom. The chemical formula of cellulose is (C6H10O5)n.
It’s spread by direct contact
True i believe because the dna is it’s taits