Question

in this activity, you will identify the conclusions that can be drawn from pasteur’s experiments using s - shaped neck flasks. which of the following conclusions can be drawn from pasteur’s experiment involving the flasks with s - shaped necks? select all statements that apply. view available hint(s) □ microorganisms can be present in nonliving matter, such as air, liquids, and solids. □ pasteur’s observations support the theory of spontaneous generation. □ pasteur’s observations support the theory of biogenesis. □ microbes can be blocked from accessing favorable growth environments. □ beef broth is an unsuitable environment for growing microorganisms. □ microbial life can be destroyed by heat. □ microbial life can arise from nonliving matter.

Explanation:

1. "Microorganisms can be present in nonliving matter, such as air, liquids, and solids": Pasteur's experiments showed microbes in air (trapped in S - neck flasks), so this is correct.
2. "Pasteur’s observations support the theory of biogenesis": Biogenesis states life comes from life. His experiments showed no life in sterile broth with S - neck (blocking microbes), supporting biogenesis, not spontaneous generation, so this is correct.
3. "Microbes can be blocked from accessing favorable growth environments": The S - neck flask blocked microbes from entering the broth (favorable for growth), so this is correct.
4. "Microbial life can be destroyed by heat": Pasteur used heat to sterilize broth, destroying existing microbial life, so this is correct.
5. "Pasteur’s observations support the theory of spontaneous generation": Spontaneous generation says life comes from non - life. His experiments disproved this, so this is incorrect.
6. "Beef broth is an unsuitable environment for growing microorganisms": Beef broth is a rich medium suitable for microbial growth (his experiment showed growth when flask was broken/neck removed), so this is incorrect.
7. "Microbial life can arise from nonliving matter": His experiments showed no life arose from non - living broth (with S - neck), disproving this, so this is incorrect.

Answer:

• Microorganisms can be present in nonliving matter, such as air, liquids, and solids
• Pasteur’s observations support the theory of biogenesis
• Microbes can be blocked from accessing favorable growth environments
• Microbial life can be destroyed by heat