Describe in 1 or 2 sentences about the objects found in the solar system that are different from the sun and the planets.

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

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?

Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic