Answer:
The two blue budgies are most likely to be yyBb each
Explanation:
there are 3 different scenarios possible for crossing blue budgies:
1) yyBB crossed with yyBB
this is not possible because it does not allow for the genotype yybb (white budgies)
2) yyBB crossed with yyBb
again, this cross will not yield the genotype yybb required for white budgies as given in the problem statement
3) yyBb crossed with yyBb
which leaves us with this option being most likely the genotype of the parent budgies who will have white budgies as offspring
Hope that answers the question, have a great day!
Answer:
The volcanic activity led to the release of large amounts of carbon dioxide at the end of the Devonian period
Explanation:
Devonian period is refereed as the Age of fish. It is also called an era of mass Extinction. During the end of Devonian period most of the terrestrial animals were extinct from Earth. Another big feature of Devonian period was massive volcanic activity which contributed to the release of carbon dioxide in the environment.
B. <span>The fossils in the lower layers are older than the fossils in the upper layers. </span>
