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Vinvika [58]
4 years ago
6

Identify the differences between Bacteria, Archaea, and Eukarya, and the evolutionary relationships between the 3 groups

Biology
1 answer:
hodyreva [135]4 years ago
5 0

Answer:

Explanation:

Archaea, Eubacteria and Eukarya are three or Eukaryota are the three domains classified by Carl Woese (1977). In the earlier systems of classifications, Archaea were included in the Kingdom Monera along with true bacteria (Eubacteria) and Cyanobacteria (blue-green algae) based on some similarities such as they both are prokaryotes.

But now it is certain that Archaea possess distinct difference from eubacteria in their cellular structures such as archaea to have only one type of RNA polymerase enzyme whereas, eubacteria possess several types of RNA polymerase enzyme and metabolic activities. Eukarya are eukaryotes having true nucleus. Archaea have a unique and separate evolutionary ancestry as well.

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During which period did humans first appear on Earth? Quaternary Neogene Paleogene Cenozoic
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ANSWER: Quaternary

just took the quiz on edge

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3 years ago
Which of the following is an example of the "ethical dilema" of creating and destroying human embryos?
NeTakaya

The option that is an example of the "ethical dilemma" of creating and destroying human embryos is option A: Some people..."believe an embryo has the same moral standing as a human being?"

<h3>What moral dilemmas do embryonic stem cells present?</h3>

The infinite differentiation potential of iPSCs, which can be used for human cloning and pose a risk for the creation of human embryos and human-animal chimeras, is the center of the current ethical debates surrounding stem cell-based therapies.

However, due to the fact that it involves the killing of human embryos, hESC research is morally and politically contentious. The controversy over abortion has a strong connection to the issue of when human existence begins in the United States.

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3 0
1 year ago
A branching diagram uses shared characteristics to classify organisms.On a branching diagram that compares the major kingdoms of
lapo4ka [179]

Animalia is the label that appears to differentiate animals from organisms on other kingdom.

Explanation:

Scientists uses the process called taxonomy to classify the organisms based on their structure, functions and relationship to other organisms.

Eukaryotes represents the domain of life. Domain Eukarya are classified into four kingdoms they are protista, fungi, plantae and animalia.

The kingdom protista represents the organisms that are simple structured and they swim through the water and obtain nutrients from the environment.

In the kingdom fungi like mushrooms absorb nutrients from the environment and they are heterotrophs.

In the plantae kingdom the organisms are plants and they are autotrophs. They prepare their own food.

In Animalia kingdom the organisms are animals and they are multicellular heterotrophs. They do not have cell walls and the reproduction is done sexually and some can reproduce asexual.

4 0
3 years ago
Where are enzymes found in the digestive system
PIT_PIT [208]
It is found in proteins.
7 0
3 years ago
The Meselson and Stahl experiment starts with E. coli containing 15N/15N labeled DNA grown in 14N media. Which result did Mesels
cricket20 [7]

Answer:

No 15N/15N labeled DNA was observed in second generation

Explanation:

Meselson and Stahl were doing an experiment to find out the semi-conservative mode of replication of DNA. The first cultured bacteria in 15N medium which was containing a heavy isotope of nitrogen. The DNA synthesized here had more density. After that they transferred the bacteria to the 14N containing medium. When bacteria reproduced and new strands of DNA were synthesized, they observed the following -

  • The first generation had hybrid DNA with 15N/14N strands
  • The second generation had both hybrid 15N/14N DNA and 14N/14N DNA strands
  • There was no 15N/15N DNA observed.

In this way they proved that one strand of DNA is kept conserved during the replication.

4 0
3 years ago
Read 2 more answers
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