Why do you think scientists think the first organisms did not need oxygen to survive?

Where is earthquake damage generally the greatest?

Imagine a cell whose membrane is permeable to water, but impermeable to solute X. If solute X is more concentrated outside the cell than inside, which way will water move by osmosis? A.

Which of the following statements is true of the corona? A. It's the outermost layer of the Sun's atmosphere B. It's the visible surface of the sun C. It's where sunspots occur D. It's responsible for the Sun's density

What are 5 factors that might limit the size of population of a opossum?

One cause of heartburn is overproduction of stomach acid. Frequent heartburn could be caused by which of the following?

How do cells become specialized for different functions?

Organisms do not adapt as a result of competition for resources. true or false

How do most cancers arise? question 1 choices choice a., from a single mutations arising simultaneously in a cluster of cells choice b., from a series of mutations that arise in the descendants of a single somatic cell choice c.

Briefly describe your experimental design for the first experiment. Make sure to include: a. The conditions you used to feed your mice (e. g., the foods you fed your mouse and the length of time the mouse was in the light box) b.

What caused the earth to develop layers as it cooled?