What is the primary function of a plant's root hairs?

a
root hairs move water and minerals up.
b
root hairs prevent excessive loss of water.
c
root hairs move food particles up and down.
d
root hairs provide a larger surface area for absorption.

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?