Which of the following is true? Question 12 options:

1. Most organisms present early in Earth's prehistory were more complex than modern organisms.
2. Species on Earth today are but a fraction of all species that ever lived.
3. The number of species existing at one time has decreased throughout history.
4. Extinctions of past species have always happened gradually and on a small scale.
5. Bacteria represent a newer form of life, not present during the early prehistory of Earth.

An electron is ejected into a horizontal uniform e⃗ field at a parallel horizontal velocity of v0. assume the electron's initial position x0, initial velocity v0, time t, magnitude of electric field e, electron's mass m, and the magnitude of the electron's charge |e|. ignore the force that earth exerts on the electron. assume the e⃗ field is in the same direction as the initial velocity. part a define the equation for the electron's velocity. express your answer in terms of the variables v0, |e|, t, e, and m.