Which is not a hypothesis stated in the text for why the Cambrian explosion occurred? A. The different chemistry in the ocean made it easier for animals to secrete hard shells
B. A super volcano exploded changing the environment and causing change in the animals
C. Oxygen levels reached a level that allowed animals to be more efficient at using aerobic metabolism
D. The emergence of predatory animals that could move around and eat other animals favored animals that could move or protect themselves.

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igneous rock formed from below the surface would have more crystals because

answer: because magma cools more slowly than lava

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.

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a