Q: 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:
A: dinosaurs

Q: Answer the following question given this paragraph: The first eight phyla listed in Table above include only invertebrate animals. Invertebrates are animals that lack a vertebral column , or backbone . The last phylum in the table, the Chordata, also includes many invertebrate species. Tunicates and lancelets are both invertebrates. Altogether, invertebrates make up at least 95 percent of all animal species. The remaining animals are vertebrates. Vertebrates are animals that have a backbone. All vertebrates belong to the phylum Chordata . They include fish, amphibians, reptiles, birds, and mammals. Q: What is the term for animals that have a backbone? Choices: - carnivores - invertebrates - herbivores - vertebrates A:
A: vertebrates

Q: Answer the following question given this paragraph: The axon of many neurons has an outer layer called a myelin sheath (see Figure above ). Myelin is a lipid produced by a type of a glial cell known as a Schwann cell. The myelin sheath acts like a layer of insulation, similar to the plastic that encases an electrical cord. Regularly spaced nodes, or gaps, in the myelin sheath allow nerve impulses to skip along the axon very rapidly. Q: What is the outer layer of an axon that acts like a layer of insulation, similar to the plastic that encases an electrical cord? Choices: - lipids sheath - nerve sheath - layer sheath - myelin sheath A:
A: myelin sheath

Q: Answer the following question given this paragraph: The body does not exist in isolation. There is a constant input of water and electrolytes into the system. While osmoregulation is achieved across membranes within the body, excess electrolytes and wastes are transported to the kidneys and excreted, helping to maintain osmotic balance. Q: The body does not exist in isolation. there is a constant input of water and electrolytes into the system. while osmoregulation is achieved across membranes within the body, excess electrolytes and wastes are transported to the kidneys and excreted, helping to maintain this? Choices: - physical balance - vacuum balance - nucleic balance - osmotic balance A:
A: osmotic balance