Which of the following can upset the balance of an ecosystem?

too much water

O not enough water

O too much light

O not enough light

o all of the above

O none of the above

Compared to the original DSM, which appeared in the 1950s, the DSM-5 has: a. over five times as many diagnostic categories. b. about twice as many diagnostic categories. c. slightly more diagnostic categories. d. slightly fewer diagnostic categories.

Toxicology is the study of the negative effects of __ on living things

Outline three ways in which water can be lost from the soil.

How does mining impact the environment?

What is meant by the statement cleaner than coal?

Kory has abnormally high levels of cytotoxic T-cells circulating in his blood. What is the most likely cause of this condition? a viral infection inflamed skin high blood pressure lymph nodes filtering lymph

Explain how egestion differs from excretion (3 marks)

The introduction of livestock to an area leads to over-grazing that removes native grasse

What is someone called that studies plants to learn about there environment

Which of the following expresses why water is so important to living organisms? It assists organisms in releasing carbon dioxide. It assists organisms in breathing in oxygen. It assists organisms in obtaining certain dissolvable substances.