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An acceptable answer would include any of these: - Nervous and hormonal systems carry signals to skin, liver and muscles. - Erector muscles relax and hairs lie flat to reduce insulation. - You sweat a lot...
Phloem vessels are made of living cells, whereas xylem cells are dead.Xylem vessels are lined with lignin and have no end walls, whereas phloem have perforated end walls. Xylem transport water in a singl...
Xylem cells have no cytoplasm or end walls, meaning they form a tube through which water can pass freely to allow water transport. Lignin strengthens the cell walls, helping to support the plant.
Prophase: The chromosomes condense and the nuclear envelope breaks down. Centrioles move to opposites ends of the cell, forming the mitotic spindle. Metaphase: Chromosomes line up at the equator of the ce...
The healthy artery has more blood flowing through it as there are no fatty deposits on the inner walls.
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