Answer the following question given this paragraph: Roundworms make up the phylum Nematoda. They have a pseudocoelom and hydrostatic skeleton. Their body is covered with tough cuticle. Free-living roundworms are found mainly in freshwater habitats. Parasitic roundworms have a variety of hosts, including humans. Q: What has a pseudocoelom and hydrostatic skeleton? Choices: - vertebrates - omnivores - gymnosperms - roundworms A:
roundworms
Answer the following question given this paragraph: The lungs of mammals are unique in having alveoli. These are tiny, sac-like structures. Each alveolus is surrounded by a network of very small blood vessels (see Figure below ). Because there are millions of alveoli in each lung, they greatly increase the surface area for gas exchange between the lungs and bloodstream. Human lungs, for example, contain about 300 million alveoli. They give the lungs a total surface area for gas exchange of up to 90 square meters (968 square feet). That's about as much surface area as one side of a volleyball court!. Q: What in mammalian lungs, increases the surface area for gas exchange? Choices: - bronchi - thorax - bronchioles - alveoli A:
alveoli
Q: Answer the following question given this paragraph: Glycogen is a branched polymer of glucose and serves as energy storage in animals. Q: What is a branded polymer that serves as energy storage in animal? Choices: - triglyceride - hydrocarbon - pathogen - glycogen A:
A: glycogen
Question: Answer the following question given this paragraph: Particles of gases are farther apart and have fewer collisions, so they are not good at transferring thermal energy. Materials that are poor thermal conductors are called thermal insulators . Figure below shows several examples. Fluffy yellow insulation inside the roof of a home is full of air. The air prevents the transfer of thermal energy into the house on hot days and out of the house on cold days. A puffy down jacket keeps you warm in the winter for the same reason. Its feather filling holds trapped air that prevents energy transfer from your warm body to the cold air outside. Solids like plastic and wood are also good thermal insulators. That's why pot handles and cooking utensils are often made of these materials. Q: What are materials that are poor thermal conductors called? Choices: - pollution insulators - sunlight insulators - warmth insulators - thermal insulators A:
Answer: thermal insulators
*Question*
Answer the following question given this paragraph: The somatic nervous system also controls some unconscious movements called reflexes. A reflex is a very rapid motor response that is not directed by the brain. In a reflex, nerve impulses travel to and from the spinal cord in a reflex arc, like the one in Figure below . In this example, the person jerks his hand away from the flame without any conscious thought. It happens unconsciously because the nerve impulses bypass the brain. Q: What is the term for a very rapid motor response that is not directed by the brain? Choices: - instinct - adaptation - sensor - reflex A:
**Answer**
reflex
*Question*
Answer the following question given this paragraph: The structure of heme (Figure 19.29), the iron-containing complex in hemoglobin, is very similar to that in chlorophyll. In hemoglobin, the red heme complex is bonded to a large protein molecule (globin) by the attachment of the protein to the heme ligand. Oxygen molecules are transported by hemoglobin in the blood by being bound to the iron center. When the hemoglobin loses its oxygen, the color changes to a bluish red. Hemoglobin will only transport oxygen if the iron is Fe2+; oxidation of the iron to Fe3+ prevents oxygen transport. Q: When the hemoglobin loses its oxygen, it changes to what color? Choices: - purple red - grayish red - light pink - bluish red A:
**Answer**
bluish red