Carbon dioxide is taken away by your circulatory system and your respiratory system gets rid of it.
True
False
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In which cell structure does thevprocess of photosynthesis take place

Which of the following represents a difference between viruses and viroids? a) viruses infect many types of cells, whereas viroids infect only prokaryotic cells.b) viruses have capsids composed of protein, whereas viroids have no capsids.c) viruses have genomes composed of rna, whereas viroids have genomes composed of dna.d) viruses cannot pass through plasmodesmata, whereas viroids can.

In 2009, 40% of all bicyclist fatalities occurred when the bicyclist, the driver, or both vehicle operators were