Answer:
The two membranes pull apart a little and create a small pocket or sack of air. As the developing bird grows, it breathes in oxygen from the air sack and exhales carbon dioxide. Several thousand microscopic pores all over the surface of the egg allow the CO2 to escape and fresh air to get in.
Explanation:
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Answer:
when the first homeosapien stood on two legs and walked the earth
Explanation:
history of evolution has always stated that the event was when "we" stood on the earth
The most important function of the environmental policy is to keep a track of human activities that can impact the environment.
Further explanation:
The environmental policy is a set of rules and regulations, laws, and policies made up by the government or organization regarding environmental issues. Ecosystem management, biodiversity maintenance, and water and air pollution are some of the issues concerning the environment. The policies which involve regulation of substances like pesticides and other industrial wastes also come under environmental policy. One of the most deliberate roles of environmental policy is to regulate and direct human activities so as to prevent the environment and its resources from the harmful effects. These policies also make sure that humans are not affected by the harmful changes in their environments.
The government intervention through policies for the protection of the environment is necessary as natural resources are not owned by any one person and tend to be over-exploited. When the waste products are produced by the factor along with the main product, it is released into the nearby water body, thereby leaving it contaminated. This water might be used by other people for drinking purposes but due to the contamination the society has to bear the extra cost of cleaning the water. Therefore, the environmental policy has provision which states that the dumping of factory waste must be done only when it is free of any hazardous chemicals. Another problem is that the common people have the incentive to utilize natural resources to any extent. With the least interference from the government the resources will be overused.
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Grade: Middle School
Subject: Biology
Chapter: Environmental Policy
Keywords:
Environmental policy, human activities, laws, rules, and regulations, policies, environmental issues, air pollution, water pollution, overexploitation of resources.
Answer:
The biological carbon cycle
Autotrophs capture carbon dioxide from the air or bicarbonate ions from the water and use them to make organic compounds such as glucose. Heterotrophs, or other-feeders, such as humans, consume the organic molecules, and the organic carbon is passed through food chains and webs.
Explanation: