Age pyramids are predicted to keep the same basic shape for 20-30 years (while a generation is in one age class). which of the following is not something that could drastically change an age pyramid?

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a. large-scale warfare

b. highly infectious deadly disease

c. population boom

d. better medication leading to lower mortality rates

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.