Answer: A mutagen is a chemical compound or form of radiation that causes mutations, which of course means a change in the dna of a cell. So, your answer would be C) an environmental agent that changes DNA.
Answer:
The kind of policies should be put in place in order to help decrease our negative impact on the environment are, tax, Subsidy, pollution permits, regulation, changing consumer behavior.
Explanation:
The government should enact policies like putting carbon tax, which will make people pay for the social cost for the pollution. Subsidy for the use of alternative source of energy, this will reduce the pollution and on other hand will also attract more people towards it. Pollution permit i.e. carbon trading scheme in which firms were given right to pollute up to certain limit, these types of permits were traded with the other firms. Proper regulations for amount of pollutants which can release in to the surrounding. Changing the behavior of the consumer is very important as well, this can be achieved by several advertisement and nudges.
There are valves in the vessels that prevents backflow, just like in the viens. ... the lymph vessels to ensure that the flow of lymph
