Aprediction or statement that can be tested is a(n)

What role do traits play in affecting an organisms ability to reproduce? finches

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 did hunter gathers do to alter the environment?