If the Earth being tilted on its rotating axis causes winter, then the Earth being tilted on its rotating axis causes what? Answer choices: - Weather - Winter - rest - spring - wind - Night and Day - Gravity - rainfall
Winter

If aseries of enzyme-mediated reactions is when a cell converts from oxygen and carbohydrates into carbon dioxide, water, and energy, then what is it when a cell converts from oxygen and carbohydrates into carbon dioxide, water, and energy? Answer choices: - A transportation fuel - extremely important - a hemisphere is tilted away from the sun - series of enzyme-mediated reactions - production of energy - the most widely used biofuel - chemical messengers - it helps plants in growing
series of enzyme-mediated reactions

If penguins are endothermic tetrapod vertebrates, then what are endothermic tetrapod vertebrates? Answer choices: - mammals - clouds - humans - penguins - jellyfish - warm-blooded - fur and fat - animals
penguins

If if global warming continues, Earth may no longer be able to sustain life, then global warming most threatens the Earth's ability to do what? Answer choices: - Sustain life - reproduce - Melt polar ice caps - growth - protect them - Resist erosion - to move people - Produce fossil fuels
Sustain life