When and where was the possibility of growing thornless varieties of plants discovered?

1 answer:

7 0

<span>The discovery of thornless plants was made around the turn of the 20th century. To name one such thornless plant, particularly, the Blackberry plant, the deviation from the thorned blackberry canes were discovered in the United States. Since then, several different thornless blackberry varieties have been cultivated for fruit gardens.</span>

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What are some facts of the great white shark. Write at least more than 5 sentneces.

Amiraneli [1.4K]

The great white shark is about 4.5 meters in length, but some can be as large as 6 meters. They weigh about 2250 kilograms. The top part of their bodies are usually blue-gray in colour. Great white sharks can reach a speed of up to 25 kilometers per hour. They search for food near the surface of the ocean. They stay below deep in the water where they are well hidden.

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Some species have evolved warning coloration , which provides an evolutionary advantage because it

Free_Kalibri [48]

Answer: The bright warning colors scare off any predators thinking of having a tasty snack.

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Explanation:

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3 years ago

does the presence of introns exons in eukaroytic cells provide more potentia diversity in gene products than is possible in pork

Leona [35]

Answer: Yes. Splicing can be done in different ways to yield different mRNAs wich will create different proteins. Prokaryotes are not able to do this.

Explanation:

DNA (deoxyribonucleic acid) is a molecule that contains the genetic information for synthesizing amino acids that form proteins. To do this, DNA must first be transcribed into RNA (ribonucleic acid) and this is the molecule used for protein synthesis (translation). The newly transcribed RNA (called primary messenger RNA) from DNA results in a very long molecule and also has regions that do not code for anything, called introns, which are removed by a process called splicing. Exons are segments in the RNA that do code for amino acids and remain in the mature mRNA after splicing.

<u>Splicing is a process by which introns are cleaved from the primary messenger RNA and exons are joined to generate mature messenger RNA.</u> In addition, alternative splicing occurs which allows different mRNA isoforms and thus different proteins to be obtained from a primary mRNA transcript. This is because the exons will be joined or spliced in different ways, giving rise to different mature messenger RNA sequences. This process occurs mainly in eukaryotes, although it can also be observed in viruses. But it does not take place in Prokaryotes (Bacteria).

In summary, exons/introns can be spliced together in different ways to yield different mRNAs sequences. Each different mRNA sequence will code for a different protein.

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3 years ago

1. The overall shape of a plant cell is most directly related to which of its parts?

EastWind [94]

Answer:cell wall i believe

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