Answer:
the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
Biomass is the most used renewable source of energy in US in the year of 2009.
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In US, the country is very cold and use of wood and other plant products as chimney fuels, or in cooking and other purposes are very common. This is because being a temperate country, US has forests of conifers which are source of soft wood, ideal for burning.
Other sources of Biomass energy comes from the biogas, wood wastes, ethanol, municipal solid wastes and even biodiesel.
As a present day scenario, although coal and petroleum are still the most used fuels in US, but the use of renewable sources of energy has increased to twice the amount from 2010 to 2018.
<span>water vapor, carbon dioxide, methane, nitrous oxide, and ozone. </span>
Sexual reproduction is a process involving the fusion of two gametes to form a zygote. Gametes are special reproductive cells produced by meiosis. It produces genetically dissimilar offspring. Offspring may inherit beneficial qualities from both parents and there is a greater genetic variation in the offspring, leading to species that are better adapted to changes in the environment.