What modifications did Kepler make to Copernicus’s model? Select two options.

1.Planetary orbits are elliptical.
2.Planets closer to the Sun move faster.
3.Planets spin in an epicycle while orbiting Earth.
4.Venus has phases due to its orbiting of the Sun.
5.Earth’s rotation causes the rising and setting of the Sun.

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.

If 360 joules of work are needed to move and create a distance of 4 m what is the weight of the crate

Procedure in pregnancy to have access to fetus. what do you call this procedure?