Directions: Select each correct answer. More than one answer may be correct. During which of these processes is oxygen consumed?

when forests are burned to clear land for farming

when aerobic bacteria break down dead algae in a pond

when plants perform photosynthesis

when plants or animals perform aerobic cellular respiration

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.