Select any answers that are correct

a. two species have a common ancestor. they both share the ancestral gene a. in species 1 the gene is a1, in species 2 the gene is a2. gene a1 produces a slightly
"better" product that gene a2 due to a minor change from the ancestral version. since we now have two species with genes that are different due to speciation, we would call gene a1 and a2 orthologs.
b. in transformation, naked dna is taken into a cell from its environment
c. in transduction, dna is transferred between cells by a virus (phage)
d. in conjugation, direct contact and exchange of dna occur.
e. gene a duplicates in a species to form a1 and a2. a1 and a2 are paralogs

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )

dna is a set of a gene held together by a chemical bond

carbon traps heat so more of it makes it hotter causing global warming. during the ice age carbon levels in the atmosphere were low so it got very cold. so the common things between them is carbon levels in the atmosphere.