Which of the following is not transported by the circulatory system?
a. blood
b. food
c. oxygen
d. carbon dioxide

which of the following would not be considered an innate behavior?
a. sucking
b. migration
c. habituation
d. instincts

the brain is apart of which body system?
a. nervous system
b. immune system
c. circularity system
d. respiratory system

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!

In each transformation of energy , some energy what?

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.