Prokaryotes and Viruses True or False: Write true if the statement is true or fa
ID: 300784 • Letter: P
Question
Prokaryotes and Viruses True or False: Write true if the statement is true or false if the statement is false. 1.Prokaryotes are single-celled organisms that lack a nucleus. 2. Since prokaryotes do not have organelles, they do not have ribosomes. 3.Cyanobacteria were probably the first organisms to photosynthesize. 4. The first Archaca discovered were the extremophiles. 5. The most common prokaryotic shapes are helices, polygons, spheres, and rods 6.Both Bacteria and Archaca have plasma membranes and cell walls. 7. Flagella help bacteria move. 8. Because they are simple single cells, prokaryotes do not need energy 9. There are billions of bacteria inside the human intestines that help digest food. 10. Insects are common vectors for spreading bacterial diseases between humans. 11.Bacteria provide vital ecosystem services-they are important producers and are needed for the carbon and nitrogen cycles. 12 Bacteria in food or water usually cannot be killed. 13.An individual virus is a virion. 14. Viruses lack cell membranes, cytoplasm, ribosomes, but they do have genetic material. 15. A virus is essentially DNA or RNA and a protective protein coat. 16. Populations of viruses still divide like cells even though they are not cells 17. Virus can remain latent in within the body for many years 18. Antibiotics only kill certain kinds of viruses. 19. Viruses are small particles, maller than eukaryotic cells but larger than prokaryotic cells. -20. Scientists did not know about viruses until they were first seen with an electron microscope in the 1930s. 21.A virus can only replicate inside a host cell.Explanation / Answer
1) The given statement is True.
Prokaryotes are unicellular organisms, which lacks a membrane-bound nucleus, mitochondria and other membrane-bound organelle.
2) The given statement is False.
Prokaryotes have RNA and protein structures known as ribosomes, which produce protein.
3) The given statement is True.
Cyanobacteria bacteria obtain energy by the process of photosynthesis. They are first autotrophic bacteria. They formed primitive atmosphere breathable and allowed life to colonise the lands.
4) The given statement is True.
Archaea were first present in extreme surroundings, such as volcanic hot springs. They were firstly appeared as extremophiles and lived in harsh surroundings.
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