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Ne4ueva [31]
3 years ago
8

Which is true about fossil fuels?

Biology
1 answer:
Lunna [17]3 years ago
7 0
Coal came from swampy environments, while oil and natural gas came from open ocean environments is true about fossil fuels. The correct option among all the options that are given in the question is the third option or option "c". Coal mainly came from decomposition of plants for a long time and oils as well as natural gases are mostly found in ocean environments.
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Answer:sry bro Ihnc

Explanation:

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3 years ago
PLEASE PLEASE HELP ME!!!! (10 POINTS!)
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Answer:

 

en Espanol en Español     print print

Bottlenecks and founder effects

Genetic drift can cause big losses of genetic variation for small populations.

Population bottlenecks occur when a population's size is reduced for at least one generation. Because genetic drift acts more quickly to reduce genetic variation in small populations, undergoing a bottleneck can reduce a population's genetic variation by a lot, even if the bottleneck doesn't last for very many generations. This is illustrated by the bags of marbles shown below, where, in generation 2, an unusually small draw creates a bottleneck.

Loss of genetic variation as a result of a population bottleneck

Download this graphic from the Image library.

Reduced genetic variation means that the population may not be able to adapt to new selection pressures, such as climatic change or a shift in available resources, because the genetic variation that selection would act on may have already drifted out of the population.

Elephant seal

 

An example of a bottleneck

Northern elephant seals have reduced genetic variation probably because of a population bottleneck humans inflicted on them in the 1890s. Hunting reduced their population size to as few as 20 individuals at the end of the 19th century. Their population has since rebounded to over 30,000 — but their genes still carry the marks of this bottleneck: they have much less genetic variation than a population of southern elephant seals that was not so intensely hunted.

Founder effects

A founder effect occurs when a new colony is started by a few members of the original population. This small population size means that the colony may have:

reduced genetic variation from the original population.

a non-random sample of the genes in the original population.

For example, the Afrikaner population of Dutch settlers in South Africa is descended mainly from a few colonists. Today, the Afrikaner population has an unusually high frequency of the gene that causes Huntington's disease, because those original Dutch colonists just happened to carry that gene with unusually high frequency. This effect is easy to recognize in genetic diseases, but of course, the frequencies of all sorts of genes are affected by founder events.

Explanation:

7 0
3 years ago
Please help me. No links and please don’t search this I tried it. The answer doesn’t make sense so yah. I Well mark brainliest
Tasya [4]

Answer:I searched it up but i did understand it, it said something bout how they would not be able to service cuz I think the might lose food or something like that and just from my opinion they are supposed to live in the cold I don’t think they’ll be able to survive the hotness.

Explanation:

5 0
3 years ago
Scientists developed a new method to detect the precise location of specific molecules within living cells. Where should they ex
Bumek [7]

The correct answer is option C, that is, in the thylakoid membrane of the chloroplast.  

Chlorophyll is situated in a clustered form in the thylakoid membrane of the organelles known as chloroplasts. Inside the thylakoid membrane, the chlorophyll molecule is enclosed by the proteins, which forms the complexes known as photosystems that mediate the light energy via the chlorophyll.  


5 0
3 years ago
Tell whether the statement is TRUE or FALSE. Comic relief was rarely used in Shakespeare, and only in his comedies.
Alexandra [31]
It is a false statement that comic <span>relief was rarely used in Shakespeare, and only in his comedies. The correct option among the two options that are given in the question is the second option. I hope that this is the answer that you were looking for and it has actually come to your desired help.</span>
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