Which statement is correct about a vacuole? It is a rigid layer that surrounds the plant cell.
It is a rigid layer that surrounds the animal cell.
It is larger in animal cells than in plant cells.
It is larger in plant cells than in animal cells.

Determine the maximum r-value of the polar equation r =3+3 cos 0

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

Gas cloud 1 is likely to form a star. gas cloud 2 is not. based on this information, match the given conditions with each cloud