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Answer:
1. All organisms are made of more than one cell. false
2. Early microscopes created by Leeuwenhoek were almost as strong as modern light microscopes. false
3. Proteins are made on ribosomes. true
4. Prokaryotic cells have a nucleus. false
5. The plasma membrane forms the physical boundary between the cell and its environment. true
6. For cells, a smaller size is more efficient. false
7. Compared to eukaryotic cells, prokaryotic cells are very complex. false
8. Organelles are located within the cytoplasm. true
9. Viruses are similar to prokaryotic cells. true
10. All cells have a plasma membrane, cytoplasm, and ribosomes. true
11. DNA is located in the nucleus of prokaryotic cells. false
12. Organelles allow eukaryotic cells to carry out more functions than prokaryotic cells. true
13. Viruses are considered living organisms. false
14. Most cells are about the size of the period at the end of this sentence. true
15. Observation of cork helped in the discovery of cells. true
Explanation:
Some organisms are unicellular and some are multicellular. The first microscope which was invented by Leeuwenhoek is weaker as compared to modern microscope. Ribosomes are the organelle of the cell which is responsible for protein synthesis. Prokaryotes do not have true nucleus. The membrane which is surrounded by the cell is called plasma membrane. Viruses are considered as both living and non-living. All the organelles of the cell is located in the cytoplasm of the cell. There is no nucleus in the prokaryotes so DNA or genetic material is present in the cytoplasm.
Answers:
1. All organisms are made of more than one cell- False.
There are some organisms with single cells termed unicellular organisms e.g. amoeba
2. Early microscopes created by Leeuwenhoek were almost as strong as modern light microscopes- false.
With the advent of modern technology, better microscopes were made from his time.
3. Proteins are made on ribosomes True
The site of protein synthesis is the ribosomes where protein are made from codes on the mRNA.
4. Prokaryotic cells have a nucleus False.
They do not have nucleus and also lack other organelles
5. The plasma membrane forms the physical boundary between the cell and its environment True
Using animal cell the plasma membrane acts as a boundary separating the cell and its surrounding.
6. For cells, a smaller size is more efficient True
With regards to single cells, their surface area to volume ratio is important, so if size is small, it is better.
7. Compared to eukaryotic cells, prokaryotic cells are very complex False
Eukaryotic cells are more complex than prokaryotic as they contain more characteristics that makes them more complex.
8. Organelles are located within the cytoplasm True
Most organelles are found embedded in the cytoplasm with their membrane bound wall separating them from the cytoplasm.
9. Viruses are similar to prokaryotic cells False
They are even simpler and lacks the basic characteristics of life.
10. All cells have a plasma membrane, cytoplasm, and ribosomes True
All living organisms have these features that in their cells.
11. DNA is located in the nucleus of prokaryotic cells False
As they do not have nucleus, this is false but they do have a circular double stranded DNA located in the nucleoid.
12. Organelles allow eukaryotic cells to carry out more functions than prokaryotic cells True
With the presence of more characteristics and organelles, they become more complex and are able to carry out more specialized functions.
13. Viruses are considered living organisms False
They are not because they lack the basics of life that characterize a living organism.
14. Most cells are about the size of the period at the end of this sentence True
15. Observation of cork helped in the discovery of cells True. This were the beginning stages that led to the discovery of the cell.
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