What is the term scientists use to describe how reproductively successful an organism is in its
environment?
a. adaptation
b. fitness
c. speciation
d. evolution

Crossing over is a method of (blank)?

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

Explain the significance of meiosis in sexual reproduction