Answer: You can tell when a chemical reaction is taking place because it is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change. All these things characterize what you look out for to find a chemical change.
Explanation:
Answer:
the F1 generation
Explanation:
If two strains of true-breeding plants that have different alleles for a certain character are crossed, their progeny are called the F1 generation
A hypothesis is considered scientific if it has something that can be supported or refuted through carefully crafted experimentation or observation
Veins provide support for the leaf and transport both water and minerals (via xylem) and food energy (via phloem) through the leaf and on to the rest of the plant.
