What is a nebula?

•the core of a massive star

•a cloud of gas and dust in space

•a swirling disk with a lot of gravity

•the debris remaining after a supernova

What is the role of cellular respiration in energy flow?

Why do you think the copper patina was kept when the Statue of Liberty was restored?

Why is it important to understand how the actions of humans affect both abiotic and biotic factors in an ecosystem?

Name some early colonisers during the establishment phase of a community on bare rock

Green plants are the first living organism in a food chain. where do plants get the energy that they pass along to the primary consumers in their food chains?

Which of the following is a sac fungus? A rhizopus, B candida C penicillium notatum

What are the stop codons

One factor that can increase sensitivity to sunlight is genetics. a. True b. False

What is the policy used most by the Fed to change the money supply? a. changes in the money creation policy b. changes in the discount rate c. changes in the reserve requirements d. open market operations

Excision within the artery (of plaque from the arterial wall) is called