Q: Answer the following question given this paragraph: Ribosomes are found in both eukaryotic and prokaryotic cells. Ribosomes are not surrounded by a membrane. The other organelles found in eukaryotic cells are surrounded by a membrane. Q: Which type of membrane are ribosomes surrounded by? A:

OPTIONS:
- partial
- permenant
- temporary
- none

A: none

input: OPTIONS:
- solar energy
- light
- magnetic fields
- electricity Now, answer this question: Answer the following question given this paragraph: You can follow the operation of an electricity-generating fission reactor in the image above. The reactor core is submerged in a pool of water. The heat from the fission reaction heats the water, which is pumped into a heat exchange container. There the heated water boils the water in the heat exchanger. The produced steam is forced through a turbine that spins a generator and produces electricity. After the water passes through the turbine, it is condensed back to liquid water and pumped back to the heat exchanger. Q: A turbine that spins a generator will produce? A:
A:
output: electricity

Answer the following question given this paragraph: 3.4 NITROGEN: RUNNING IN CYCLES Introduction: In the previous assignment, you studied the carbon cycle. In a previous unit, you described the water cycle. Carbon and water are matter. As you learned in the first unit, matter cycles. Nitrogen is another form of matter that cycles. Like water and carbon, nitrogen is essential to life. Also, like water and carbon, its cycles affect you. Therefore it is important that you learn about the nitrogen cycle, how it affects you, and how you affect it. Assignment: There are three parts to this assignment. You must complete all three parts to receive credit for the assignment. Be sure to turn in all three parts at the same time. I will not correct partial assignments. THANKS! PART ONE: 1. Describe the nitrogen cycle. Describe how nitrogen goes from the atmosphere to a form usable to plants, how it is used and excreted by animals, and how it returns to the atmosphere. In your description be sure to explain the words: * decay * denitrification. Q: What cycle vital to plants includes a process called denitrification? A:

OPTIONS:
- carbon cycle
- sedimentation cycle
- photosynthesis
- nitrogen cycle

Answer: nitrogen cycle

Problem: OPTIONS:
- mammals
- dinosaurs
- reptiles
- fish
Q: Answer the following question given this paragraph: The earliest vertebrates were jawless fish. They evolved about 550 million years ago. They were probably similar to modern hagfish (see Table above ). The tree diagram in Figure below summarizes how vertebrates evolved from that time forward. Q: The earliest vertebrates were jawless what? A:
Answer: fish

Problem:OPTIONS:
- mesosphere
- lithosphere
- asthenosphere
- troposphere

Answer the following question given this paragraph: Air movement takes place in the troposphere. This is the lowest layer of the atmosphere. Air moves because of differences in heating. These differences create convection currents and winds ( Figure below ). Q: What is the lowest layer of the atmosphere called? A:
****
A: troposphere

Problem:OPTIONS:
- landscape
- plant life
- ecology
- climate

Answer the following question given this paragraph: Formed when elements either gain or lose electrons. Q: What is the most important factor determining soil type? A:
****
A:
climate