The structure of the skin is an effective barrier against bacteria. The multiple layers of epidermis, while can be invaded by foreign organisms, has a high turnover rate which means it is constantly shedding, therefore even the bacteria is shed protecting the body. Lastly, the skin's lipids maintain an acidic pH which slows and stops growth and replication of bacteria.
Cytoplasm
nuclus
membrane
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Answer:
The correct option is B
<u> Succession</u> refers to the process that facilitates plant communities gradually changing over a period of time in order to respond to their environment.
Explanation:
Succession can be described as changes that occur in an ecosystem in response to the changes in the environment or any other disturbances.
Succession can be of two types. 1. Primary succession 2.Secondary succession
Primary succession occurs on lands where there was no life before. With time, plants start to grow here and a community is developed.
Secondary succession occurs on lands that have been destroyed due to any disturbances like a flood or a fire. Over time, new plants start to grow on this land and a community is developed.
2 because the 1st energy level can only hold 2 electrons and the 2nd holds 4
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