Sperm, Egg (1 egg and 3 polar bodies), 4 different, haploid
Answer:
Root hair.
Explanation:
Root hairs form an important surface as they are needed to absorb most of the water and nutrients needed for the plant. They are also directly involved in the formation of root nodules in legume plants. ... Having a large surface area, the active uptake of water and minerals through root hairs is highly efficient.
I think the answer is non reactive. As the outer shells gets filled ,valency decreases, so reactivity also decreases.
All the best
