Which biome has characteristically low rainfall?

What are the four basic classes of organic molecules how do they differ structurally and functionally

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone