Answer the following question given this paragraph: Communities are made up of populations of different species. In biology, a population is a group of organisms of the same species that live in the same area. The population is the unit of natural selection and evolution. How large a population is and how fast it is growing are often used as measures of its health. Q: What do you call a group of organisms of the same species that live in the same area? Choices: - system - ecosystem - biosphere - population A:
population
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Answer the following question given this paragraph: Q: What kind of symmetry do echinoderm larvae have? Choices: - internal - radial - spherical - bilateral A:
bilateral
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Answer the following question given this paragraph: Most plants continue to grow as long as they live. They grow through a combination of cell growth and cell division (mitosis). The key to plant growth is meristem, a type of plant tissue consisting of undifferentiated cells that can continue to divide and differentiate. Meristem allows plant stems and roots to grow longer (primary growth) and wider (secondary growth). Q: What is a type of plant tissue consisting of undifferentiated cells that can continue to divide and differentiate? Choices: - epidermis - cambium - ganglion - meristem A:
meristem
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Answer the following question given this paragraph: Earth and Moon orbit each other. This Earth-Moon system orbits the Sun in a regular path ( Figure below ). Gravity is the force of attraction between all objects. Gravity keeps the Earth and Moon in their orbits. Earth's gravity pulls the Moon toward Earth's center. Without gravity, the Moon would continue moving in a straight line off into space. Q: What keeps the earth orbiting the sun? Choices: - strong nuclear force - magnetic force - weak nuclear force - gravity A:
gravity
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