Answer:
Time Span of the renewability of fuels is a major factor when considering what type of fuel to use in a project. Fossil fuels, including <u>oil</u>, <u>coal</u>, and <u>natural gas</u>, require <u>thousands</u> to <u>millions</u> of years to renew. Alternative fuels, including <u>biomass</u>, <u>solar</u>, and <u>wind</u> power, have a huge advantage since they require <u>no time</u> to about one <u>hundred</u> years to renew. Making the <u>alternative</u> fuels the preferred choice for the conservation of natural resources.
Explanation:
I have been able to missing in the gaps with the correct word that is appropriate in the sentence.
Fossil fuels are known to be hydrocarbons which are majorly oil, coal and natural gas. They are formed from the remains of dead animals and plants. The process of fossil fuel formation started millions of years ago. It actually a longer time to renew. The alternative do not take longer time.
<span>b.internal fertilization
</span>Sexual reproduction provides genetic variation because the sperm and egg that are produced contain different combinations of genes than the parent organism. Sexual reproduction involves meiosis which is the process of a cell doubling its DNA, shuffling its genes and then dividing the shuffled DNA among four cells.<span>Each resulting cell, or gamete from meiosis has only half the amount of DNA as the parent cell. So in order to form a new organism, two gametes, sperm and egg, must fuse, further mixing the genes to produce more genetic variation.</span>
Answer:
Urea is produced when foods containing protein, such as meat, poultry, and certain vegetables, are broken down in the body. Urea is carried in the bloodstream to the kidneys, where it is removed along with water and other wastes in the form of urine.
Explanation:
Primary succession occurs in essentially lifeless areas while secondary succession happens where there were previous communities
The correct answer would be D) An observation that has a number associated with it.
