Answer:
Trees and grasses are often pollinated by wind; flowers are often pollinated by insects.
Explanation:
Answer:
Ravine is a synonym of canyon. is that ravine is a deep narrow valley or gorge in the earth's surface worn by running water while canyon is a valley, especially a long, narrow, steep valley, cut in rock by a river. A deep narrow valley or gorge in the earth's surface worn by running water.
Explanation:
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<span>__________class_____ distinctions operate in virtually every aspect of our lives, determining the nature of our work, the quality of our schooling, and the health and safety of our loved ones.</span>
The answer is: pseudostratified ciliated columnar epithelial cells.
We can find these type of cells in the upper part of the trachea and bronchi, and through the whole upper respiratory tract (nasal cavity included).
Their job is to produce a mocous secretion (look up <em>cilia</em>) help us to stop external, microscopical, materials from entering our lungs, and so we can sneeze and cough them away.
