What is the efficiency of a lever if it can lift a 1200 N mass 3 meters with 400 N
of effort?

Maria wanted to grow a fern in her backyard. acting on a suggestion from a friend, she collected brown dots from the underside of a fern's leaves and then potted them. after a few days, maria saw small fern leaves erupting from the pot. which statement explains this phenomenon? a. the fern transitioned from gametophyte generation to sporophyte generation. b. the fern grew as a result of mitosis. c. the fern transitioned from sporophyte generation to gametophyte generation. d. the fern grew to be genetically identical to its parent plant.

2. which is the last step in the scientific method?

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes