When you think of an organism changing its environment, you may think of large animals like humans that leave obvious signs of where they have been. however, even very small organisms make an impact on the environment. one small organism makes an impact by burrowing in the soil, to mix it and make it more fertile.

what animal create more fertile soil?
a) bacteria
b) earthworms
c) fungi
d) slugs

The kind of fertilization found in the majority of aquatic animals is (internal or external) fertilization.

Graded assignment lab report answer the questions below. which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.

Which of the following organisms are capable of self-fertilization? a. plants b. tigers c. humans