Q: Unlike free-living species of flatworms that are predators or scavengers, what forms feed from the tissues of their hosts? Read this paragraph and choose the correct option from the provided answers: Flatworms The relationships among flatworms, or phylum Platyhelminthes, is being revised and the description here will follow the traditional groupings. Most flatworms are parasitic, including important parasites of humans. Flatworms have three embryonic germ layers that give rise to surfaces covering tissues, internal tissues, and the lining of the digestive system. The epidermal tissue is a single layer of cells or a layer of fused cells covering a layer of circular muscle above a layer of longitudinal muscle. The mesodermal tissues include support cells and secretory cells that secrete mucus and other materials to the surface. The flatworms are acoelomate, so their bodies contain no cavities or spaces between the outer surface and the inner digestive tract. Physiological Processes of Flatworms Free-living species of flatworms are predators or scavengers, whereas parasitic forms feed from the tissues of their hosts. Most flatworms have an incomplete digestive system with an opening, the "mouth," that is also used to expel digestive. Choices: - aquatic - mutualistic - herbiverous - parasitic A:
parasitic

Q: What category of animals in the vertebrate group has a relatively small brain but highly developed sense organs? Read this paragraph and choose the correct option from the provided answers: Fish have a nervous system with a brain. Fish brains are small compared with the brains of other vertebrates. However, they are large and complex compared with the brains of invertebrates. Fish also have highly developed sense organs. They include organs to see, hear, feel, smell, and taste. Choices: - mammals - arthropods - primates - fish A:
fish

Q: Q: In what do substances combine chemically to form a new substance? Read this paragraph and choose the correct option from the provided answers: A mixture is a combination of two or more substances in any proportion. This is different from a compound, which consists of substances in fixed proportions. The substances in a mixture also do not combine chemically to form a new substance, as they do in a compound. Instead, they just intermingle and keep their original properties. The lemonade pictured above is a mixture because it doesn't have fixed proportions of ingredients. It could have more or less lemon juice, for example, or more or less sugar, and it would still be lemonade. Choices: - suspension - component - element - compound A:
A: compound

Question: Q: What is the touch response in plants called? Read this paragraph and choose the correct option from the provided answers: The surface temperature of most stars is due to their size. Bigger stars produce more energy, so their surfaces are hotter. But some very small stars are very hot. Some very big stars are cool. Choices: - phototropism - pollenation - sensitivity - thigmotropism A:
Answer: thigmotropism

*Question*
Q: What type of energy is stored in an object because of its position or shape? Read this paragraph and choose the correct option from the provided answers: Potential energy is the energy stored in an object because of its position or shape. It includes gravitational potential energy and elastic potential energy. Gravitational potential energy depends on an object's weight and height above the ground. Choices: - magnetic - mechanical - kinetic - potential A:
**Answer**
potential

(Question)
Q: Atoms of what element ultimately form in a red supergiant? Read this paragraph and choose the correct option from the provided answers: In a red supergiant, fusion does not stop. Lighter atoms fuse into heavier atoms. Eventually iron atoms form. Choices: - gold - steel - coal - iron A:
(Answer)
iron