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Answer 1

Answer:

1. Flowering plants reproduce sexually through a process called pollination. The flowers contain male sex organs called stamens and female sex organs called pistils. Cross-pollination happens when the wind or animals move pollen from one plant to fertilize the ovules on a different plant.

2. a) When yeast cells are reproducing rapidly during beer or wine production, the oxygen is used up. Yeast respires using glucose in the sugar that was added to the dough. Bubbles of carbon dioxide make the bread rise. The alcohol that's produced evaporates as the bread is baked.

b) alcohol, glycerol, and carbon dioxide

c) It's common to get tired after a long or tough workout. In general, this occurs because your muscles run out of energy. Your central nervous system also loses its ability to keep moving your muscles.