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Brut [27]
3 years ago
7

_____ are believed to be the ancestors of the protists and first eukaryotes.

Biology
2 answers:
Alika [10]3 years ago
7 0
The answer to the question is A 
BabaBlast [244]3 years ago
6 0

Answer: B, Archaea

Explanation: The Archaea microbes are believed to be the ancestors of the protists, and also the first eukaryotes. They obtain most of their energy from sulfur, salt, hydrogen, and carbon dioxide. They also tend to be more tolerant of extreme environmental conditions, they are often found where most other life is unable to exist such as at the bottom of the sea or in volcanoes.

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Six centromeres are observed in a prophase cell from an insect,how many pairs of chromosomes are present​
gulaghasi [49]

<u>Answer:</u>

<em>Six centromeres are observed in a prophase cell from an insect, there are </em><u><em>20 pairs of chromosomes present</em></u><em>. </em>

<u>Explanation:</u>

<em>Centromeres is defined as the part of the DNA</em> which are held responsible for the directional changing of chromosomes.

And these chromosome gets divided into <em>2 daughter cells while undergoing the process of mitosis and meiosis. </em>

<em>Chromosome is basically defined as a thin structure</em> as of a threadlike which is made out of nuclei acid and protein which is <em>located at the nucleus of various living cells</em>

6 0
2 years ago
Read 2 more answers
Scientific Method
Dmitry [639]

For your answer, I am sure your blank is "analyze". This is because you must analyze or "look over" your data that has been collected.

3 0
3 years ago
The histone proteins are among the most slowly evolving proteins. For example, a histone protein called histone H4 in cows and p
juin [17]

The statement is true, histones are proteins that are high in the amino acids lysine and arginine, making them extremely basic in their structure.

Histones control the degree of packaging of DNA during the processes of gene expression, replication or repair of hereditary material, among many others.

Histones H2A, H2B, H3 and H4 are small and basic proteins that are highly conserved in evolution and are composed of a globular domain at the carboxy-end, and by regions known as "tails", which are found at the amino-terminal end.

These tails are high in the amino acids lysine and arginine, which give them a positive charge.

This region is the site of numerous post-translational modifications that, it has been proposed, would modify the histone charge, altering the accessibility of the DNA and the protein / protein interactions with the nucleosome.

Chromatin compaction occurs due to the interaction between the negative charges of DNA and the positive charges of amino acids, mainly located on the tails of histones H3 and H4.

Therefore, we can conclude that the modifications on the amino acids lysine and arginine that form the basic part of the histone structure alter their functions.

Learn more about histone proteins here: brainly.com/question/14984828

8 0
2 years ago
As well as carbohydrates, what is wholemeal bread a good source of?
svp [43]

Answer:

Proteins

Explanation:

Wholemeal bread is a rich source of carbohydrates and protein along with unsaturated fats, vitamins and minerals. Hope this helps.

4 0
2 years ago
4) The taxonomy of life on earth defines that humans and bats are both classified as: A) Animalia B) Chordata C) Mammalia D) All
lord [1]

Answer:

D - all of these

Explanation:

They are both mammals

Bats are classified in:

  • Kingdom: Animalia
  • Phylum: Chordata
  • Class: Mammalia

Humans are classified in:

  • Kingdom: Animalia
  • Phylum: Chordata
  • Class: Mammalia

Therefore, the answer is D.

4 0
2 years ago
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