Answer the following question given this paragraph: There are two basic types of cells, prokaryotic cells and eukaryotic cells . The main difference between eukaryotic and prokaryotic cells is that eukaryotic cells have a nucleus . The nucleus is where cells store their DNA , which is the genetic material. The nucleus is surrounded by a membrane. Prokaryotic cells do not have a nucleus. Instead, their DNA floats around inside the cell. Organisms with prokaryotic cells are called prokaryotes . All prokaryotes are single-celled (unicellular) organisms. Bacteria and Archaea are the only prokaryotes. Organisms with eukaryotic cells are called eukaryotes . Animals, plants, fungi, and protists are eukaryotes. All multicellular organisms are eukaryotes. Eukaryotes may also be single-celled. Q: What is the main difference between eukaryotic and prokaryotic cells? Choices: - prokaryotic cells have a nucleus - eukaryotic cells have a flagella - eukaryotic cells have a cell wall - eukaryotic cells have a nucleus A:
eukaryotic cells have a nucleus
Answer the following question given this paragraph: Haumea is the third-brightest Kuiper belt object. Haumea has two moons. Haumea's odd oval shape is probably caused by its extremely rapid rotation. It rotates in just less than 4 hours! Like other Kuiper belt objects, Haumea is covered by ice. Its density is similar to Earth's Moon, at 2.6 3.3 g/cm 3 . This means that most of Haumea is rocky. Q: Haumea, which is the third brightest kuiper belt object has an odd oval shape which is probably caused by what? Choices: - unusually rapid rotation - particularly rapid rotation - Slow rotation - extremely rapid rotation A:
extremely rapid rotation
Q: Answer the following question given this paragraph: Elastic rebound occurs when materials return to their original shape. Q: What happens when materials return to their original shape? Choices: - reverberation - second life - restoration principle - elastic rebound A:
A: elastic rebound
Question: Answer the following question given this paragraph: The electrical potential difference between the two plates is expressed as , the electric field strength times the distance between the plates. The units in this expression are Newtons/coulomb times meters, which gives the final units Joules/coulomb. Voltage is an expression of the amount of potential energy per unit charge. The work done moving a charge against the field can be calculated by multiplying the electric field potential by the charge, . Q: What is it called when a charge moves against a field? Choices: - momentum - power - force - work A:
Answer: work
*Question*
Answer the following question given this paragraph: The scientific method is not a step by step, linear process. It is a way of learning about the world through the application of knowledge. Scientists must be able to have an idea of what the answer to an investigation should be. In order for scientists to make educated guesses about the answers, they will base their guesses on previous knowledge, with the notion of extending that knowledge. Scientists will often make an observation and then form a hypothesis to explain why a phenomenon occurred. They use all of their knowledge and a bit of imagination in their journey of discovery. Q: In the scientific method, what is the initial, unproven explanation for why something is occurring? Choices: - concepts - idea - theories - hypothesis A:
**Answer**
hypothesis
(Q).
Answer the following question given this paragraph: John Romanes, modified by CK-12 Foundation. Wings of bats and birds are analogous structures . Public Domain. Q: Due to similar function, the wings of bats and birds are referred to as what type of structures? Choices: - symmetrical structures - matching structures - Identical structures - analogous structures A:
(A).
analogous structures