A family has two male children. One brother has a straight thumb, while the other brother has a bent thumb. What causes the difference

Which of the following is an example of this type of co-evolution

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

Explain why ecosystem diversity results in species diversity in a healthy biosphere