A couple has two children, both of whom are boys. Show the following cross between a male and a female in the punnett square. What is the percent chance that the parents' next
child will be a boy?
Cross
х
Percent chance boy?
1

um 50%

Explanation:

16) true

17) true

18) true

19) false all mass extinctions marks the end of the Cretaceous Period.

20) true

21)not sure but here is some reasons students discovered that living things can die and decay. Soft parts are more likely to decay than hard parts. For this reason, the most common fossils are bones, teeth, shells, and the woody stems of plants. 

22) true

23) eukaryotes have nucleus and prokaryotes doesn't.

24) true

25)true they evolved from eohippus