The function of the plasma membrane is

to protect the cell from it's surroundings

Explanation:

the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells

the eggs of the insects should be the first thing collected at the scene.

false

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave