Question

choose the correct option
1] Antibiotics mainly act against....
[bacteria, viruses, algae, fungi
2] Carbon dioxide is released into the atmosphere through.........
[ burning of fossil fuels volcanic activity respiration, all of these]
3] In.
the flowers are reproductive organs.
[ Angiosperms, Gymnosperms, Pteridophyta, Bryophyta ]
4] The bacteria which spoil cooked food are.......
[ Saccharomyces, Lactobacilli, Clostridium, Rhizobium.]
if you know give the correct ans only​

Answer 1

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1) Bacteria (Option A)

❒ Antibiotics are chemical substances which helps in preventing the growth of bacteria or kills the bacteria. They are generally prepared from bacteria and fungi. The first antibiotic was made by Alexander Fleming named Penicilin obtained by Penicillium notatum.

2) All of these (Option D)

❒ Carbon dioxide is released out from our body during the process of Respiration. Fuels contains carbon, which is released when they are burnt in the form of Carbon dioxide (CO2). And, during volcanic eruption also, a lot of CO2 is released.

3) Angiosperms (Option A)

❒ It is the group of plants that bear flowers and produce seeds enclosed inside a fruit. Most of them grows in terrestrial habitats, and known as mesophytes. Others also includes Hydrophytes, Xerophytes etc.

4) Clostridium (Option C)

❒ The species of bacteria named Clostridium is known for spoilage of food. The food spoiling is caused due to damp environment, abundant moisture and proper temperature. Also, Lactobacillus is used for intentional spoilage of milk to make curd.

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