Antimicrobial disinfectants such as triclosan are being used more frequently to clean surfaces, prevent infection, and eliminate as many bacteria in our personal environment as possible. What is one downside to this trend? Question 5 options:

It could increase the levels of dust mites.

It could kill harmless viruses.

It could reduce the number of helpful bacteria.

It could prevent infection by fungi.

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.

Amutagen is 1: a living thing that has undergone a mutation. 2: an agent that causes a mutation in dna. 3: a mutation that has affected one gene. 4: a chemical that can poison living cells.

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?