Agood hook for why science is important and a good intro starter due tomorrow

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 is true of sea slugs in these orders

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above