Why is it difficult for scientists to study the inside of planet Earth?

What is the process of pulling apart an n2 molecule nevermind i got it

What type of plant is good for a bioassay and where can i buy it? i only have a month.

An organism's reproductive strategy includes all of the following except a. the number of offspring produced. b. the amount of energy expended in producing offspring. c. the length of time parental care is given d. the number of alleles an organism passes on.