What is happening in this image? How does it help to illustrate the concept of natural selection?

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria

Sperm pass through the and connect to a short ejaculatory duct. vas deferens prostrates seminiferous tubules none of the above

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis