Ribosomes synthesize proteins
1.The presence of valves 2.the milking action of skeletal muscles 3. the veins as the muscles contract
The right option is; A. Solar
Solar energy is sustainable.
Solar energy is considered as a renewable energy resource. Solar energy is sustainable because it occurs naturally and it is derived from a source that is inexhaustible (sun). It can be depended on for the long term. All renewable energy sources such as geothermal, wind, biomass and hydro are sustainable.
Answer:b
Explanation:
Heterogeneous mixture because it is not chemically bound together