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ale4655 [162]
2 years ago
15

Please help i’ll give brainliest

Biology
1 answer:
vaieri [72.5K]2 years ago
5 0

Answer:

Producers................

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Which of the following statement correctly compares the structures of plant cells and animal cells
Sergio039 [100]

Answer:

Both plant and animal cells have a nucleus and chloroplast where protein synthesis takes place.

8 0
3 years ago
True or false? One possible way to alter chromatin structure such that genes could be transcribed would be to make histone prote
Dmitrij [34]

Answer:

False

Explanation:

The histones that are more positively charged, tight hardly to negatively charged DNA. So, enzymes, such as acetyltransferases, that reduce the positive charge of histones promote transcription.

Chromatin structure and its modifications can change the package of the DNA and consequently, alter the gene expression. The most common modifications of the chromatin are covalent modifications such as acetylation/deacetylation (by acetyltransferases and eacetylases), methylation (by methyltransferases), and phosphorylation (by kinases).  This is the way of gene expression regulation.

The effects of modifications are different, for example methylation promotes  condensation of the chromatin and as a consequence, prevents binding of transcription factors to the DNA (transcription is repressed).

Acetylation loosens the association between nucleosomes and DNA (because it neutralizes the positive charge of histones) and consequently promotes transcription. Deacetylation is a process opposite to acetylation.

5 0
2 years ago
Researchers argue that some bacteria found in the human gut are in a symbiotic relationship with humans, called mutualism. Which
Rama09 [41]

Answer:

Bacteria provides vitamins to humans

Explanation:

The correct answer would be that bacteria provides vitamins to humans.

<u>By definition, mutualism is a type of symbiotic relationship between two organisms in which both benefit from each other.</u>

Bacteria in the gut of humans that provides vitamins to humans also benefit by making the human gut their shelter. While the vitamins represent an important nutrient to humans for their proper functioning, the shelter is also necessary for the bacteria for their safety.

<em>Hence, the observation that bacteria provide vitamins to humans is consistent with the argument of researchers that some bacteria found in the human gut are in a mutually beneficial relationship with humans.</em>

6 0
3 years ago
Scientists think that dolphins and whales may have evolved from a common ancestor. What evidence supports this hypothesis
ikadub [295]

Scientists think that dolphins and whales may have evolved from a common ancestor because they have similar anatomies.

<h3>What is a common ancestor?</h3>

A common means different animals now, have evolved from a single ancestor or animal.

These animals may share common characters and structures.

Whales, dolphins, and porpoises are evolved from a common ancestor; cetacean.

The animals that evolved from cetaceans are all aquatic, primitive cetaceans were amphibians too.

Thus, They have similar anatomies.

Learn more about ancestors

brainly.com/question/15990290

#SPJ4

6 0
1 year ago
Which of the following are benefits of cardio exercise? A. Resting blood pressure decreases B. Energy levels increase C. The hea
12345 [234]

D is the correct answer.

8 0
3 years ago
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