Pollen grains scientists a identify plants and make assumptions on past climate conditions. b understand tree growth and make assumptions on past climate conditions. c understand how earth was shaped and make assumptions on past climate conditions. d identify major ice ages and make assumptions on past climate conditions.

The answers A(: just took the quiz

Pollen grains help scientists  -

The correct answer is option A.

A: Identify plants and make assumptions on past climate conditions.

Pollen grains are helpful for new plants and flower formation. These travel in air or through birds and animals and this helps in plantation. Scientists can identify the plant species through these grains.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.