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Posted in Biology

1. Which of the following statements are true? a. since all cells carry out cellular respiration, they contain mitochondria b. a cell cannot be subdivided into smaller units that maintain the living state c. plant cells contain chloroplasts and no mitochondria while animal cells contain mitochondria and no chloroplasts. d. the cell membrane’s function to prevent diffusion of any substances into or out of the cell. 2. A biologist discovers a new unicellular organism and classifies it as a prokaryote. The cell is very small, contains a cell membrane, a cytoplasm, DNA in a nucleus, and no other cell organelles. Which statement below represents a correct response to the biologist’s discovery and classification? The organism is a prokaryote, because it lacks cell organelles such as mitochondria, Golgi apparatus, and endoplasmic reticulum. The organism is a prokaryote, because it is so small and simple in structure. The organism is a eukaryote, because it has a nucleus. The organism is a eukaryote, because it has a cell membrane, a cytoplasm, and DNA. What would most likely happen to cells placed in fresh water? a.water would flow out of them because they are hypotonic to the external environment b water would flow into them because they are hypotonic to the external environment c.water would flow out of them because they are hypertonic to external environment d.water would flow into them because they are hypertonic to external environment

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