The paleontologist's partner finds something slightly different. She finds a rock in the form of an acient animal It seems like after the animal's body cayed, it was replaced by sediment which hardened into the very form of the ancient animal that they could pick up.

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.

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some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.