Which polymer structure should be used if a strong and heat - resistant adhesive is required? 1. Linear
2. Branched
3. Networked
4 . Cross - linked

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

a electronegativity decreases beacuse the size of nucleus is bigger.