E. Choose the correct option to fill in the blank.
1. _____(Bacteria/Fungi) are the most primitive forms of life on Earth.
2._____ (Protozoa/Bacteria) lack a definite nucleus.
3. Disease causing bacteria can be killed by chemicals called_____ (antibiotics/yeasts) 4.______ (Volvox/Virus) are freshwater colonies of green cells.
5. ______(Euglena/ Rhizopus) is a fungus that commonly grows on stale bread.
6. ______(Vaccines/Bio-fertilizers) contain dead or weakened germs introduced into our body to provide ____(diseases/immunity).
Answers
Bacteria
Antibiotics
Volvox
Rhizopus
Vaccines , Immunity
Answer:
1. Bacteria are the most primitive forms of life on Earth.
2. Bacteria lack a definite nucleus
3. Disease-causing bacteria can be killed by chemicals called antibiotics.
4. Volvox are freshwater colonies of green cells.
5. Rhizopus is a fungus that commonly grows on stale bread.
6. Vaccines contain dead or weakened germs introduced into our bodies to provide immunity.
Explanation:
Bacteria lack a definite nucleus and nuclear membrane. Its genetic material is simply diffused in the cytoplasm. Bacteria are the most primitive form of life on earth. They belong to the kingdom monera. Antibiotics inhibit or destroy the growth of bacteria. Antibiotics may limit the nutrient from reaching the bacteria. thus hindering its division and spreading capacity. Rhizopus is called the bread mold and is seen commonly growing on stale bread. Vaccines may contain dead or attenuated viruses or germs and help in immunization. Volvox is a chlorophyte green algae that live in freshwater.