In the 1800s, how did Darwin explain the origin of species?

Why would your muscle cells need to be supplied with more food when there is a lack of oxygen than when there is plenty of oxygen present?

Difference between carbon-12 and carbon-14

Most scientists come up with questions to investigate out of the blue

What does it mean for a species to be in stasis?

Where are you most likely to find plant roots? O A. Chorizon O B. O horizon A horizon O D. B horizon

Question 1 Which one of the following supports the hypothesis that life has changed over time? Prokaryotes have no nucleus. The cell has no membrane. Some fossil plants have deep roots. Fossils are distinct from rock layer to rock layer.

Jesse finds a burned-looking rock outside near a small crater. What has she most likely found? a comet an asteroid a meteor a meteorite

2 ways seeds can be carried by animals

Without adding specific regulatory proteins, how might you stimulate transcription from the gene of interest relative to the transcription of the other genes on your DNA template?

Which process copies from DNA onto mRNA