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marshall27 [118]
3 years ago
13

Introns and transposons can act as sites where recombinational crossovers occur. Transposons can also catalyze genetic rearrange

ments. Rearrangements occurring within these sequences very detrimental than those occurring elsewhere in the genome.
A. True
B. False
Biology
1 answer:
Feliz [49]3 years ago
6 0

Answer:

False

Explanation:

Rearrangements on introns and transposons usually don't cause severe consequences because those sequences are not part of coding genes and therefore cannot code for proteins, and if a rearrangement occur within a coding sequence of a gene might cause an incomplete and non-functional protein causing severe consequences to expression levels of that particular gene.

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If a species makes up a small portion of the community by weight, yet exerts a disproportionate influence on community diversity
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Answer:

The correct answer will be- Keystone species

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The structure of a community is largely determined by the number of species present in the community called species richness and the species diversity.

The species which can play an important role in determining the community could be of two types the foundation species and keystone species.

The species which directly influence the diversity of a community irrespective of their number and abundance is known as the keystone species.

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Thus, keystone species is the correct answer.

8 0
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What description best explains why viruses can become more pathogenic to host that were not affected by the virus before?
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Answer:

New cells are naive to the infectious cells who attack it or they are not well prepared to deal with the different scenarios. But, the cells who are attacked before has the set or sequence of the viral or bacterial genome strand been identified by them, which leads to more safety or protection from these foreign bodies.

Explanation:

  • Mechanism To attack a host cell:

The viruses and other infectious material enters and attacks the host cell, by breaching its membrane wall and installing or leaving a gene of its own inside the cell. Which then combines with the genome of the cell and it goes through the process of replication, translation etc,along with the host cell machinery. Which then spreads the specific gene strand more in the environment

  • <u>Camouflage obtained by the infectious cell to hide it self:</u>

After the genome enters the host cell at first it does not recognizes the strands or foreign cells, as they cover there body with a camouflage sort of membrane and they look more like the body cells.

  • <u>Reactions by the host cell and as a whole the body:</u>

The organisms detects the genome of the infections cells or strand, as they store the data about it in its server or database. As if the next time they were under attack then precautions will be there by the host cell to deal with it.

As for the cell who are never attacked before will be less safe to deal with these foreign bodies.

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The eukaryotic cell organelle that most resembles a bacterial cell is the
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Answer:

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Both bacteria and mitochondria have their own cell

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