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Nimfa-mama [501]
2 years ago
6

Aldo Leopold, an ecologist, wrote about his home state of Wisconsin in The Sand County Almanac. In one moving section, he descri

bed a triangular cemetery, founded in the nineteenth century, that, because of its unusual shape, contained a tiny patch of prairie, unmowed and undisturbed. Every year, sometime in July, Leopold would watch a single silphium plant bloom there, the only one he found in that part of the state. He used this example to discuss the many plants native to the prairie that have been replaced by a few commercial plants grown by farmers. The disappearance of native plants is an issue of:
Biology
1 answer:
nikklg [1K]2 years ago
3 0

Answer:

D) biodiversity.

Explanation:

  • Aldo Leopold was an American ecologist, conservationist and naturalist. He developed the environmental ethics and movement of wilderness conservation.  
  • His use of ideas to discuss the plants-native of the prairie grassland that have been replaced by a commercial-plants grown by the farmers. The disappearance of the native plants is an-issue of depletion of biodiversity.
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2- Explain how land that gets broken up can<br> contribute to loss of species diversity
Minchanka [31]

Explanation:

Broken up land land contributes to a loss of species diversity through geographoc isolation. Geographic isolation is the physical barrier dividing the communities. It usually stops the gene flow between species in a process called allopatric speciation, contributing to reproductive isolation.

Further Explanation:

Spontaneous modifications in the genome can occur during the cycle of cell division, called mutations. These errors occur as copies of the DNA are produced within the cell; mutations may range from small modifications called single nucleotide polymorphisms to large-scale deletions and multi-gene additions.

Such mutations create variations that within a group become dominant, resulting in the creation of different, genetically distinct organisms called species.

Learn more about mutations at brainly.com/question/4602376

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

#LearnWithBrainly  

7 0
3 years ago
Why does you need to breathe more during exercise respiratory system?
swat32
If you don’t, you’ll either pass out or die.
3 0
3 years ago
A teacher cut an apple into three wedges of the same size.
dexar [7]

I am not entirely sure what you mean by "responding variable" but I'm going to guess  it was the vinegar since it has been used as a  perservative for years.

Hope that helps in some way.

7 0
3 years ago
Waat phenotype has the greatest frequency in a trait that follows a normal distribution
Neporo4naja [7]

Answer:

A phenotype is the physical observations of anything, really. For example, lazuli bunting (a bird species) has feathers that range from dull brown to bright blue. the dull brown and bright blue birds are best at mating. adult males are aggressive toward the bluish-brown birds. The greatest frequency here is that 2 seperate colors are able to mate best, yet, the mixed birds are attacked.

Explanation:

I hope this helped,

have a great day.

5 0
3 years ago
Smilin is a (hypothetical) protein that causes people to be happy. It is inactive in many chronically unhappy people. The mRNA i
Studentka2010 [4]

Answer:

The single nucleotide mutation affects the splicing of the mRNA molecule of Smilin in unhappy people. This with result in a truncated protein lacking part of it amino acidic chain

Explanation:

It's true that the information of aminoacids that form the proteins is codified on the exons, but introns also have important information, for example, the sequences related to the splicing of the mRNA exons.

Briefly, during the splicing process, the introns are removed, leaving the mRNA that is going to be translated (there could be also other post translational modifications before going to ribosomes).

Also, there's different ways to splice the different exons. For example, let's say a mRNA has four exons, so the mature mRNA could have exons 1-2-3-4, or 1-2-4, or 1-2-3, it depends on the location of the splicing signals. This are called splicing alternatives, so the same original mRNA can give arise to different forms of a protein.

In the particular case of Smilin, apparently the DNA has a single mutation in the intron for the mRNA of the protein. Despite it might seem as a minor difference, it causes the final mRNA (the one that is translated) to lose an internal stretch of 173 nucleotides.

A possible explanation is that this single mutation is affecting a splicing signaling sequence, making the splicing complexes skip one exon. Again, if we imagine that the original protein has four exons, this means that the happy people has an mRNA with all the exons, while unhappy people is lacking one.

As a result, the protein Smilin will be lacking part of its internal region. The actual effects this has on the protein function will depend on the role of the deleted section.

5 0
2 years ago
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