Prokaryotes are single-celled organisms that use flagella for movement. They do not have a distinct nucleus or membrane-bound organelles, unlike eukaryotes. Their DNA is often circular and not organized in chromosomes.
The characteristics of prokaryotes listed include their being single-celled and their use of flagella for movement. However, prokaryotes don't have a distinct nucleus, rather they have a region known as nucleoid where their DNA is located. Also, they lack membrane-bound organelles. They are simpler in structure compared to eukaryotic cells. Their DNA is often circular and not organized in chromosomes as in eukaryotes.
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oxygen flow is low and his lungs do not have a lot of capacity
B.)No cell nucleus
C.) Cannot live in extrememe enviorments
D.)Multicellular
Answer: The correct answer is B) No cell nucleus.
Archaea is a domain that comprises of single celled microorganisms, which are prokaryotes. These organisms can survive in extremely harsh conditions like hot springs and salt water.
Example- Methanogens.
Archea was first classified as a separate group of prokaryotes under the three domain classification system of Carl Woese in 1977 that included Archaea, Bacteria, and Eukarya.
Since they are a group of prokaryotic organisms, therefore, they are devoid of nucleus and membrane bound cell organelles.
Thus, option B) is the right answer.
(1) increased warming of local ecosystems
(2) increased exposure to ultraviolet light
(3) reduction in the pH of acid precipitation
(4) reduction in the frequency of floods and
droughts
Answer:
The correct answer is option (2) "increased exposure to ultraviolet light".
Explanation:
The ozone shield or the ozone layer is a region of the atmosphere comprised of high concentrations of ozone that absorbs most of the Sun's ultraviolet radiation. Therefore, damage to the ozone shield will cause increased exposure to ultraviolet light over the United States. This could cause harmful consequences such as an increase of cases of skin cancer, sunburn and cataracts.
2. producing a new drug to lower blood pressure
3. researching the relationship between exposure to UV rays and skin cancer
4. all of the above
Answer: 3. researching the relationship between exposure to UV rays and skin cancer.
Explanation:
Applied research is an application based research as it utilizes the knowledge of scientific literature to solve the problems related to science. It is based upon the experimental procedure to find the cause of a natural phenomena.
Researching the ralationship between exposure to UV rays and skin rays. is the correct answer because it can be observed on the basis of experimental procedures the impact of UV under control conditions over the skin.
Evaluating the effectiveness of chemotherapy, producing a new drug to lower blood pressure and researching the relationship between exposure to UV rays are all examples of applied research. The correct option is D.
Thus, scientific explorationthat is carried out specifically to address practical issues or enhance existing conditions is referred to as applied research. Studying and examining the effects and results of a medical procedure in a clinical context is necessary to assess the efficacy of chemotherapy for cancer patients.
Creating and testing a pharmaceutical substance with the goal of treating a medical condition is necessary to create a new blood pressure-lowering medication.
In order to adopt preventative measures and public health interventions, research on the association between exposure to UV radiation and skin cancer tries to learn more about the relationship between UV radiation and the emergence of skin cancer.
Learn more about applied research here:
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