PLZ HELP ASAP!! WILL GIVE 50 PTS
why do the planets move in a way that promotes life?

Before the can be observed by using a transmission electron microscope, cells are sliced into very thin sections. what disadvantage does this procedure present in the study of cellular parts

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3: 1. if the allele are designated (r & r) receptively. what is the probable genotypes of the round seeds which produced f 1 ? rr & rr rr only rr & rr rr only rr only

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?