Q: Q: Sounds, chemicals, and visual cues are examples of what between animals? Read this paragraph and choose the correct option from the provided answers: For individuals to cooperate, they need to communicate . Animals can communicate with sounds, chemicals, or visual cues. For example, to communicate with sounds, birds sing and frogs croak. Both may be communicating that they are good mates. Ants communicate with chemicals called pheromones . For example, they use the chemicals to mark trails to food sources so other ants can find them. Male dogs use pheromones in urine to mark their territory. They are "telling" other dogs to stay out of their yard. You can see several examples of visual communication in Figure below . Choices: - migration - circulation - procreation - communication A:
A: communication

Q: Q: The eyes of all vertebrates possess a single one of these structures? Read this paragraph and choose the correct option from the provided answers: Choices: - vessel - sty - stalk - lens A:
A: lens

Q: Q: What fills the epidermal cells that make up fingernails and toenails? Read this paragraph and choose the correct option from the provided answers: Fingernails and toenails consist of specialized epidermal cells that are filled with keratin . The keratin makes them tough and hard, which is important for the functions they serve. Fingernails prevent injury by forming protective plates over the ends of the fingers. They also enhance sensation by acting as a counterforce to the sensitive fingertips when objects are handled. Nails are similar to claws in other animals. They cover the tips of fingers and toes. Fingernails and toenails both grow from nail beds. As the nail grows, more cells are added at the nail bed. Older cells get pushed away from the nail bed and the nail grows longer. There are no nerve endings in the nail. Otherwise cutting your nails would hurt a lot!. Choices: - cellulose - chromatin - amino acids - keratin A:
A: keratin

Q: Q: Most of the pathogens that cause stis enter the body through mucous membranes of which organs? Read this paragraph and choose the correct option from the provided answers: Most of the pathogens that cause STIs enter the body through mucous membranes of the reproductive organs. All sexual behaviors that involve contact between mucous membranes put a person at risk for infection. This includes vaginal, anal, and oral sexual behaviors. Many STIs can also be transmitted through body fluids such as blood, semen, and breast milk. Therefore, behaviors such as sharing injection or tattoo needles is another way these STIs can spread. Choices: - eyes - kidneys - stomach - reproductive organs A:
A: reproductive organs