Q: What do scientists use to study the deep without going to the seafloor? Read this paragraph and choose the correct option from the provided answers: Sending humans to the seafloor is expensive and dangerous. Having to return humans safely to the surface limits what a mission can do. Remotely operated vehicles , or ROVs, allow scientists to study the deep without going to the seafloor. These small vehicles carry cameras and scientific instruments. ROVs were used to study inside the Titanic . This would have been far too dangerous for a manned sub to enter. Scientists control ROVs electronically with sophisticated operating systems. Choices: - drill rigs - telescopes - ultrasound machines - remotely operated vehicles A:
remotely operated vehicles

Q: What is the process in which many new species evolve in a short period of time to fill available niches called? Read this paragraph and choose the correct option from the provided answers: After a mass extinction, many habitats are no longer inhabited by organisms because they have gone extinct. With new habitats available, some species will adapt to the new environments. Evolutionary processes act rapidly during these times. Many new species evolve to fill those available habitats. The process in which many new species evolve in a short period of time to fill available niches is called adaptive radiation . At the end of this period of rapid evolution, the life forms do not look much like the ones that were around before the mass extinction. One example came after the extinction of the dinosaurs. Mammals underwent adaptive radiation and became the dominant life form. Although they lived in the habitats the dinosaurs had lived in, they didn't look much like the dinosaurs. Choices: - adaptation - learned behavior - spontaneous mutation - adaptive radiation A:
adaptive radiation

Q: Q: What collects fluid from a system of canals in the cytoplasm? Read this paragraph and choose the correct option from the provided answers: Choices: - placenta - mitochondria - chlorophyll - vacuole A:
A: vacuole

Question: Q: Pressure relationships inspiration (or inhalation) and expiration (or exhalation) are dependent on the differences in pressure between the atmosphere and these? Read this paragraph and choose the correct option from the provided answers: Pressure Relationships Inspiration (or inhalation) and expiration (or exhalation) are dependent on the differences in pressure between the atmosphere and the lungs. In a gas, pressure is a force created by the movement of gas molecules that are confined. For example, a certain number of gas molecules in a two-liter container has more room than the same number of gas molecules. Choices: - salts - enzymes - bones - lungs A:
Answer: lungs

*Question*
Q: What is the name for a combination of elements that acts as a different substance? Read this paragraph and choose the correct option from the provided answers: An element is a fundamental chemical part of a substance; there are about 115 known elements. A compound is a combination of elements that acts as a different substance; there are over 50 million known substances. Choices: - contrast - mixture - solution - compound A:
**Answer**
compound

*Question*
Q: What are physical properties that do not depend on the substance present called? Read this paragraph and choose the correct option from the provided answers: Physical properties that do not depend on the amount of substance present are called intensive properties . Intensive properties do not change with changes of size, shape, or scale. Examples of intensive properties are as follows in the Table below . Choices: - extensive properties - multilateral properties - internal properties - intensive properties A:
**Answer**
intensive properties