8th 2nd Semester Exam Review

Which type of organism is unicellular, prokaryotic and can survive in harsh conditions, such as volcanic hot springs?

• Protista

• Archaebacteria

• Eubacteria

• Plantae

Which body system is responsible for carrying oxygen to the muscles?

• Nervous

• Respiratory

• Digestive

• Circulatory

Prokaryotes have which characteristic?

• Multicellular

• No DNA

• No Membrane-Bound

A person living near this energy pyramid would like to reduce the grasshopper population. Which situation would allow the person to reduce the grasshopper population?

• Planting more trees

• Catching more squirrels

• Removing the snakes

• Adding more shelter for the frogs

Which of the following would create a stable ecosystem?

• Carbon dioxide and water released only by abiotic sources

• Animals provide oxygen to plants, and plants provide the nitrogen to animals

• Interactions between biotic and abiotic components regulate carbon dioxide and water levels

• Organisms provide all energy for the maintenance of the ecosystem

What is one disadvantage of asexual reproduction?

• A new population can be established by a single individual in a relatively short period of time

• All members of a population are genetically very similar and less able to survive

• Organisms are physically smaller than other organisms

• More likely to develop a variety of characteristics

When white dwarfs are compared to supergiants, white dwarfs have-

• High luminosity

• Lower luminosity and cooler temperatures

• Higher luminosity and higher temperatures

• Lower luminosity and higher temperatures

What type of star would it be if it had a luminosity of .01 and a temperature of 15,000 K?

• White dwarf

• Main sequence

• Super-Giant

• Giant

Which characteristic can help determine which stars are closest or farthest from Earth?

• Size

• Color

• Brightness

• Temperature

Which source of light has been found to be a collection of billions of stars and not individual stars?

• Comets

• Galaxies

• Constellations

• Meteors