Answer:
*Covers and lines body surfaces.
*Cells are densely packed together with minimal amount of intercellular substance.
*Cells are firmly attached by intercellular junctions.
*Cells rest on a basement membrane partly derived from underlying connective tissue.
Plant cells need both chloroplasts and the Mitochondria because they are perform both the photosynthesis and the cell respiration. Chloroplast converts the light (solar) energy into the chemical energy during the photosynthesis, while the mitochondria, is the powerhouse of the cell produces the ATP- the energy currency of the cell during the respiration.
Mitochondria are the membrane-bound cell organelles (mitochondrion, singular) that generate the most of the chemical energy which are needed to the power of the cell's as biochemical reactions. Chemical energy is produced by the mitochondria which is stored in small molecule that is called adenosine triphosphate (ATP).
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Answer:
According to Darwin, species evolve because those with undesirable or dangerous traits don't reproduce as much or die before they can reproduce. This causes the organisms with the most desirable traits that allow for higher reproduction or survival rates (which go hand in hand) to pass those traits on until they eventually evolve into a different species.
