Which of the following explains why using locally-produced resources (as opposed to those produced a great distance away) can be considered a form of conservation?
a)
transporting resources consumes additional resources.
b)
using local resources reduces the requirement for transport.
c)
buying local with tax revenue.
d)
both a and b.

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.