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Rzqust [24]
3 years ago
5

What is atmospheric nitrogen fixation and how does it affect organisms?

Biology
1 answer:
finlep [7]3 years ago
5 0
Atmospheric nitrogen fixation<span> is the process in which lightning converts </span>nitrogen<span>gas in the </span>atmosphere<span> into usable compounds. It makes </span>nitrogen<span> available to</span>organisms<span>.</span>
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A recent study compared the Homo sapiensgenome with that of Neanderthals. The results of the study indicated that there was a mi
MissTica

The question is incomplete. The complete question is:

A recent study compared the Homo sapiensgenome with that of Neanderthals. The results of the study indicated that there was a mixing of the two genomes at some period in evolutionary history. What data were discovered that suggested this conclusion

A) some Neanderthal sequences not found in living humans

B) a few modern H. sapiens with some Neanderthal sequences

C) duplications of several Neanderthal genes on a Neanderthal chromosome

D) some Neanderthal chromosomes that are shorter than their counterparts in living humans

Answer:

B) a few modern H. sapiens with some Neanderthal sequences

Explanation:

The mixing of genomes of two species generally results in shared sequences and some common genetic traits in the descendants of these species. Mixing of genomes of <em>Homo sapiens</em> and Neanderthals would have resulted in the presence of some common gene sequences in their genomes. If the conclusion that the mixing of genomes of these two species has occurred is correct, some of the modern <em>Homo sapiens </em>should have the genome sequences that were otherwise present in the genomes of Neanderthals only but not in that of the <em>Homo sapiens</em>.

8 0
4 years ago
On a global scale, energy _____ ecosystems whereas chemical elements _____ ecosystems. see concept 55.1 (page 1237) on a global
Kay [80]
<span>The choices for this question are:
</span>-is biologically magnified in ... are recycled in
-is dissipated in ... flow through
-flows through ... are recycled in
-is continuously supplied to ... are continuously removed from
<span>-is recycled in ... flow through</span><span>

On a global scale, energy flows through ecosystems whereas chemical elements are recycle in ecosystems. So the answer is the third option. 

Energy flows through the ecosystem. Most energy comes from sunlight and it is transformed into chemical energy by autotrophs. When they are consumed by heterotrophs the energy is passed on, until it dissipates as heat.  
</span><span>
Chemical elements like carbon and nitrogen, on the other hand, are cycled between biotic and abiotic factors in an ecosystem. This is not possible for energy. These chemical elements come from abiotic factors like the air, light and soil. They are incorporated in the biomass of the photosynthetic organisms and are consumed by other organisms. They are changed back into their inorganic form when the organism dies and are broken down by decomposers and the cycle goes on. So they are constantly being recycled. 

In summary, energy needs a continuous source to be able to maintain and sustain the energy flow in the ecosystem. Chemical elements, on the other hand, are just recycled through processes between abiotic factors and biotic factors. </span>
8 0
3 years ago
Describe the coastline and the features of the Pacific Ocean
Ksivusya [100]

Answer:

Coastline has lots of beaches and is an area for breeding for many  sea animals.

Explanation:

idk

7 0
4 years ago
scientists discovered a eukaryote organism from a group known as Monocercomonoides that lacks functional mitochondria?
vlabodo [156]
I think it is mitosis
3 0
3 years ago
Which nonmetals, besides hydrogen, are most often involved in hydrogen bonding?
SSSSS [86.1K]
Hello! 

I believe the answer is : 
Oxygen, Nitrogen, and Fluorine because they are highly electronegative and very small. 

Good luck! 
5 0
3 years ago
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