Answer the following question given this paragraph: Crocodilia, containing both alligators and crocodiles, is an order of large reptiles. Reptiles belonging to Crocodilia are the closest living relatives of birds. Reptiles and birds are the only known living descendants of the dinosaurs. Some would day that alligators and crocodiles actually look like small dinosaurs. Dinosaurs that evolved wings are the ancestors of birds. Q: Reptiles and birds are the only known living descendants of what? Choices: - mammals - fossils - dragons - dinosaurs A:
dinosaurs
Answer the following question given this paragraph: The speed of most waves depends on the medium, or the matter through which the waves are traveling. Generally, waves travel fastest through solids and slowest through gases. That's because particles are closest together in solids and farthest apart in gases. When particles are farther apart, it takes longer for the energy of the disturbance to pass from particle to particle through the medium. At the following URL, you can watch an animation showing what happens when a wave passes from one medium to another. Q: Why do waves travel faster through solids? Choices: - particles fuse together - particles range together - particles pipe together - particles closer together A:
particles closer together
Q: Answer the following question given this paragraph: Flame Cells of Planaria and Nephridia of Worms As multi-cellular systems evolved to have organ systems that divided the metabolic needs of the body, individual organs evolved to perform the excretory function. Planaria are flatworms that live in fresh water. Their excretory system consists of two tubules connected to a highly branched duct system. The cells in the tubules are called flame cells (or protonephridia) because they have a cluster of cilia that looks like a flickering flame when viewed under the microscope, as illustrated in Figure 41.10a. The cilia propel waste matter down the tubules and out of the body through excretory pores that open on the body surface; cilia also draw water from the interstitial fluid, allowing for filtration. Any valuable metabolites are recovered by reabsorption. Flame cells are found in flatworms, including parasitic tapeworms and free-living planaria. They also maintain the organism's osmotic balance. Q: How are valuable metabolites recovered? Choices: - replication reaction - osmosis - metabolism - reabsorption A:
A: reabsorption
Question: Answer the following question given this paragraph: The central vacuole contains large amounts of a liquid called cell sap, which differs in composition to the cell cytosol. Cell sap is a mixture of water, enzymes, ions, salts, and other substances. Cell sap may also contain toxic byproducts that have been removed from the cytosol. Toxins in the vacuole may help to protect some plants from being eaten. Q: What is the liquid inside the central vacuole called? Choices: - cytoplasm - osmotic fluid - chloroplasm - cell sap A:
Answer: cell sap
*Question*
Answer the following question given this paragraph: Humid continental climates have warm winters and cold summers. Subarctic climates have cool short summers and very cold winters. Q: What kind of summers do humid continental climates have? Choices: - dry summers - warm summers - wet summers - cold summers A:
**Answer**
cold summers
(Q).
Answer the following question given this paragraph: An anticline is a fold that arches upward. The rocks dip away from the center of the fold ( Figure below ). The oldest rocks are found at the center of an anticline. The youngest rocks are draped over them at the top of the structure. When upward folding rocks form a circular structure, that structure is called a dome . If the top of the dome is eroded off, the oldest rocks are exposed at the center. Q: What is the term for a fold that arches upward? Choices: - tailslide - underlain - tailplane - anticline A:
(A).
anticline