If significant amounts of fossil fuels continue to be used to support energy needs, what will be a negative impact for our planet? A. a decrease oxygen levels, leading to lower air quality
B. increased air pollution, leading to better human health
C. decreased water quality, leading to increases in marine diversity
D. increased levels of carbon dioxide, leading to warmer global climates

What are they five steps of cloning?

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.

As a result of climate change earths temperature is rising and sea ice is melting what is a likely effect? answer : populations of walruses and polar bears will decline