Answer:
1. They are weird insects and the rest you could look it up
Mercury because it is way too hot to have an atmosphere.
Using your reflexes can prevent you from getting hurt in the first place.
Answer:
18. Which four body systems interact to allow a person to sneeze:
F. Muscular, immune, nervous, respiratory.
Don't really know the answer for the second one, sorry <33
If CO2 was in very small amounts then it would be the limiting factor of photosynthesis, this means the process will take place at a much slower rate because it is lacking one of the raw materials it needs for the process to occur. To find the optimum light intensity you really need all other factors to be at optimum levels or in abundance.
