Why is the presence of organic material in the soil important? a) it wards away plant eating organisms. b) it increases plant growth. c) it increases sunlight absorption. d) it increases water absorption.

Which type of respiration takes place when there is no oxygen present

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.

What is one affect on the australian environment due to the introduction of non-native european rabbits