Q: Q: Elasticity is the ability of a material to return to its original shape after being stretched or? Read this paragraph and choose the correct option from the provided answers: Elasticity is the ability of a material to return to its original shape after being stretched or compressed. When an elastic material is stretched or compressed, it exerts elastic force. This force increases the more the material is stretched or compressed. Choices: - combustion - Contained - correlated - compressed A:
A: compressed

Q: Q: What type of seeds come from plants that were traditionally grown in human populations, as opposed to the seeds used for large-scale agricultural production? Read this paragraph and choose the correct option from the provided answers: larger cities and economic growth therein leads to the construction of dams, the consequent flooding of ecosystems, and increased emissions of pollutants. Other threats to tropical forests come from poachers, who log trees for their precious wood. Ebony and Brazilian rosewood, both on the endangered list, are examples of tree species driven almost to extinction by indiscriminate logging. The number of plant species becoming extinct is increasing at an alarming rate. Because ecosystems are in a delicate balance, and seed plants maintain close symbiotic relationships with animalswhether predators or pollinatorsthe disappearance of a single plant can lead to the extinction of connected animal species. A real and pressing issue is that many plant species have not yet been catalogued, and so their place in the ecosystem is unknown. These unknown species are threatened by logging, habitat destruction, and loss of pollinators. They may become extinct before we have the chance to begin to understand the possible impacts from their disappearance. Efforts to preserve biodiversity take several lines of action, from preserving heirloom seeds to barcoding species. Heirloom seeds come from plants that were traditionally grown in human populations, as opposed to the seeds used for large-scale agricultural production. Barcoding is a technique in which one or more short gene sequences, taken from a well-characterized portion of the genome, are used to identify a species through DNA analysis. Choices: - old-fashioned seeds - modified seeds - original seeds - heirloom seeds A:
A: heirloom seeds

Q: Q: Knees and elbows are examples of what part of the skeletal system? Read this paragraph and choose the correct option from the provided answers: As you age, you might start noticing pain in your knees or elbows. These are examples of joints. Joints are the part of the skeletal system that connect your bones. Joint pain is a common problem as people age. Choices: - cartilage - muscles - nerves - joints A:
A: joints

Q: Q: What is the radula made mostly of? Read this paragraph and choose the correct option from the provided answers: Many species have a feeding structure, the radula , found only in mollusks. The radula can be thought of as a "tongue-like" structure. The radula is made mostly of chitin. Types of radulae range from structures used to scrape algae off of rocks to the beaks of squid and octopuses. Choices: - casein - chlorophyll - schist - chitin A:
A: chitin