PLEASE HELP WITH THESE 2 I WILL GIVE BRAINLIEST

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels

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

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?