1. Cell theory was first proposed in 1838. Evidence obtained through additional scientific investigations resulted in the current cell theory. Which statement describes a component of the original cell theory that was removed because of the new scientific knowledge? A. All living things are made of cells. B. All cells come from other preexisting cells. C. Cells form through spontaneous generation. D. Cells are the basic structural and functional units of life. 2. Which invention from the 17th century allowed for the development of modem cell theory? A. X-rays B. computers C. the light microscope D. the scanning electron microscope 3. A plant and an animal are both living things. According to the Cell Theory, what can you conclude about these two very different organisms? A. Plants have cells but animals do not. B. They are both made of one or more cells. C. They both come from the same kind of cell. D. They both come from a non-living organism. The combined observations of Mattias Schleiden, Theodor Schwann and Rudolph Virchow

Q: 1.Describe the cytoskeleton function in cell movement. 2.What is the Endomembrane System?

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A:

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Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.