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alexgriva [62]
3 years ago
6

Scientists have described and named a total of_______species.

Biology
1 answer:
Whitepunk [10]3 years ago
3 0

Answer: 1.9 million species

Explanation: I looked it up

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You have an organism with the following characteristics - it grows as single cells. It is heterotrophic and has a cell wall that
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Halophiles of Archaea domain

Explanation:

The Archaea are characterized as single cells. They can exihibit both the autotrophic and heterotrophic mode of nutrition. Their cell walls do not contain peptidoglycans but contain pseudo-peptidoglycans etc.  Their environmental conditions also need to be known to give a definitive identification and also are their organelles membrane bound.

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Discuss how climate change, overpopulation, or a local environmental issue may have impacted land or aquatic biomes.  Was the im
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LOCAL ENVIRONMENT ISSUE:
People dump a lot of trash in the sea, and the sea creatures living there goes through a lot of trouble to live with all the muck getting in them. Of course, don't write it like that in your assignment - you'll get told off for the straight forwardness.
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3 years ago
What is a gene?
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your answer is D) A section of DNA that codes for a specific trait

Explanation:

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In an ecosystem with similar species, we typically find
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3 years ago
When DNA is compacted by histones into 10-nm and 30-nm fibers, the DNA is unable to interact with proteins required for gene exp
poizon [28]

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This is through the process of methylation and phosphorylation of histones tails.

Explanation:

The addition of   a methyl group  to the amino acid of the histones of the  nucleosomes   that compacted DNA  in the nucleus is  called mehtylation, while the addtion of phodpahte is phosphorylation

Its  effects  on  gene expression depends on the number of <u> methyl groups, and type of amino acid that  methylated. During transcription. </u>

<u />

The DNA double strands are compacted and therefore  hidden  from transcription factors and enzymes of transcription by the hitones  tails of the neuclosomes, Methylation  weaken the binding bonds between the tails and DNA structure ; thereby aiding the uncoiling of DNA  from the  tails.(nucleosomes).This chemical  reaction  aided  DNA  strands  exposure   to transcription factors and enzymes, for initiation of transcription. This explains the dyanmic activity of methylation

Futhermore phophorylation also favours unwrapping of DNA, by imitating   modifying enzymes e.g H3Y41E and H3T45E  and convert it to→→ H3Y41phopspahte to aid DNA unwrapping and accessibility to  transcription factors and RNA polymerase Enzymes,

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3 years ago
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