11. The primary job of the cell wall is to a. protect the cell and keep its shape.

b. store DNA.

c. direct and monitor a cell's activities.

d. help the cell move.

12. Which organelle is not found in animal cells?

a. mitochondrion

b. ribosome

c. chloroplast

d. smooth endoplasmic reticulum​

Aseries circuit consists of a resistor with r = 20 ? , a capacitor with c = 0.01 f, and a decaying battery with e = 300e? 5t. if the initial charge is 0, find the charge as a function of time t

Write the equation for momentum, first using symbols for the variables, then using words for the variables.

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s