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ollegr [7]
3 years ago
8

Please help!

Biology
1 answer:
Dafna1 [17]3 years ago
6 0

Answer:

C. could not provide a mechanism for moving continents

Explanation:

Without the discovery of magnetic reversals recorded on the ocean floor, scientists  could not provide a mechanism for moving continents.

Magnetic reversals are responsible for geological shifts and depend on the distribution of tectonic plates that causes movements of continents.

Asymmetric movement of tectonic plates leads to movement of continents  and the degree of asymmetry varies with the same rythm of the magnetic reversal rate.

Hence, discovery of magnetic reversals are important to identify the mechanism for moving continents.

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How people and animals evolved
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Describe why translation of an mrna can start before transcription of the mrna is complete in prokaryotes but not in eukaryotes.
Lera25 [3.4K]

Answer:

<h2>In prokaryotes both transcription and translation occurs in cytoplasm (they lack true nucleus) while in eukaryotes, transcription occurs in nucleus while translation occurs in cytoplasm.</h2>

Explanation:

1. Prokaryotes do not have nucleus, so both transcription and translation occurs in the cytoplasm, therefor translation start before the completion of transcription.

2. While in eukaryotes, they have true nucleus, and there protein synthesis machinery (ribosomes) and  is situated in the cytoplasm.

So in eukaryotes transcription occurs in the nucleus, and after the completion of transcription, mRNA is processed and finally export into cytoplasm for translation.

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4 years ago
Reversing Near-Extinction of Species Research the Internet to identify a case where the near-extinction of a species has been su
Pani-rosa [81]

Answer:

Pandas are a model whose species where close to wiped out yet was effectively turned around. The goliath panda has quite recently been downsized from 'Imperiled' to 'Powerless' on the worldwide rundown of species in danger of termination. The International Union for Conservation of Nature (IUCN) declared the positive change to the goliath panda's legitimate status in the Red List of Threatened Species, highlighting the 17% ascent in the populace in the decade up to 2014, when an across the country enumeration discovered 1,864 mammoth pandas in the wild in China.  

Dangers to the mammoth panda incorporate living space misfortune, low paces of multiplication and chasing. A huge extent of the panda's territory has just been lost: logged for timber and fuel wood, or cleared for agribusiness and framework to address the issues of the zone's blasting populace. The Chinese government restricted signing in the panda's natural surroundings in 1998, however new streets and railroads are proceeding to slice through the district, further dividing the woodlands. This disengages panda populaces and keeps them from rearing. It additionally leaves them increasingly defenseless against bamboo kick the bucket offs. Bamboo normally ceases to exist each 40-120 years, contingent upon the sort. Before, pandas could relocate to new zones looking for nourishment, however these days that they are never again ready to 'follow' the bamboo.

Despite the fact that endeavors have been made to forestall the chasing of Pandas in China, they can even now be executed by poachers or in traps expected for different creatures.  

The Giant Panda has been the focal point of one of the most escalated, prominent endeavors to recuperate an imperiled species. In 1981, China joined the Convention on the International Trade in Endangered Species (CITES), which made exchange of Panda skins illicit. Establishment of the 1988 Wildlife Protection Law prohibited poaching and gave ensured status to the Giant Panda (recorded as Category I, the most elevated level of security). The National Conservation Project for the Giant Panda and its Habitat of 1992 spread out a master plan for Panda protection and set up a Panda save framework, which today has developed to 67 stores. Augmented by over half since the Third National Survey, this hold framework presently ensures 67% of the Panda populace and about 1.4 million hectares of Panda. These endeavors to end poaching and ensure Panda living space assumed a huge job in Panda recuperation. The Chinese government likewise put resources into framework and limit working for hold staff, set up hostile to poaching watch, diminished human exercises inside stores, and now and again moved human settlements from inside to outside of stores.

3 0
3 years ago
7th grade science plz help !!
Reptile [31]

Answer:

soil erosion, soils getting taken out lil by lil becuz its taking from the top layer more and more over time'

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5 0
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d1i1m1o1n [39]
The answer is <span>hy<span>pothalamus.</span></span>

<span>The hy<span>pothalamus <span>regulates the </span></span></span><span>sympathetic nervous system, part of </span><span> autonomic nervous system, </span><span>associated with fight-or-flight </span><span>responses.
During stress situations the sympathetic nervous system is more activated, causing a response of either run or fight. Because of that, the body needs to be prepared and there will be elevated blood pressure (the blood is going more to the skeletal muscle, heart,etc), dilated pupils (for better peripheral vision) and increased respiration. </span>
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4 years ago
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