What are we referring to here needlenos and slip joint

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

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

What process creates gametes? a. fertilization b. mitosis c. meiosis