Which of the following is not true concerning tropical plantations?
a.
they are generally found in humid, tropical climates.
b.
wheat and corn are common products of tropical plantations.
c.
most crops from tropical plantations are exported.
d.
cocoa, coffee and tea are common products of tropical plantations.

Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial

Using data from seismic waves, geologists have learned that earth’s interior is made up of several