Which phrases are true of only the mantle? Check all that apply.

made of three layers

has a tarry layer

made of two layers

has a molten outer layer

has a solid outer layer

What term is commonly used to describe foods that are grown without the use of synthetic pesticides?

Why are controls not needed in the arthropods experiment described in the study guide?

2. When water reaches a certain temperature, it will freeze. In a pond or lake, will the water freeze all the way to the bottom? Explain how this occurs or does not occur and why it is important to the organisms that live in the water.

How does climate change cause the ocean's thermohaline current to slow down? A. Increase in temperature - > Ice melts and cools water - > cool, dense water sinks B.

Analyse why good laboratory design is important for efficiency, effectiveness and safety.

Would evolution by natural selection be able to happen if there was NO differential survival and reproduction within a species? Why or why not?

Air pollution is caused by A. natural events and human activities. B. human activities but not natural events. C. heavy rainfall. D. the sun.

Which of the following can increase the growth of algae when it enters streams? A) insecticide B) herbicide C) carbon dioxide D) oil

Which are the best examples of types of molecules used for energy storage by organisms? Choose all answers that are correct. A. lipids B. proteins C. nucleic acids D. carbohydrates

Tell me five different invasive species