Asubstance directly involved in cellular communication
within the human body is
(1) an antibody (3) a hormone
(2) an antibiotic (4) a starch

In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia

What is the following best defines climate?

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.