After completing 10 years of experimentation, a scientist reports a new scientific theory explaining the movement of sand on beaches.
How do you know that this information is valid?

There were too few years of data.

The initial hypothesis was incorrect.

The problem was not important enough.

Theories develop through repeated experimentation.

the answer is d (apex) good luck : ))

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.