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Which explains the relationship between sperm cells and pollen grains?

In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?