Explanation:
I think it is to support and protect the cell and keeps large harmful molecules outside the cell because it allows only materials such as gases, water to pass through it.
Helpful bacteria found in the gut are <u>not pathogens</u>.
Explanation:
An organism is said to be pathogenic if it can invade, grow and multiply in an individual host’s body and cause disease in the susceptible host’s body by evading the immune system of the host.
Viruses belong to obligate pathogen because they require the cellular machinery of the host’s body to grow and replicate and thereby will cause disease in the host.
Disease-causing bacteria are pathogenic like Salmonella, C. difficile, etc.
Helpful bacteria of the gut also called the human gastroinstestinal or gut microbiota, or the gut flora are those bacteria living in the digestive system of the body and improve the gut health. Gut bacteria like Lactobacillus generally help by:
- Forms a central line of resistance or barrier and prevents exogenous bacterial colonization and protects the intestinal mucosa from other pathogens
- Help in fermentation of undigested or nondigestible food or carbohydrates like large polysaccharides of cellulose, pectin etc.
- Gut bacteria belonging to the commensal bacteria help by digesting the available unused nutrients in the body
- Gut bacteria help in the synthesis of certain vitamins
i think its A but iam not sure..........
Answer: Aristotle is known as the Father of Biology. In 4th century, Aristotle travelled to Lesvos filled with wildlife. His fascination with what he found there, and his fascination is what led to the birth of a new science known as Biology.
Explanation:
Answer:
A. division of the nucleus
Explanation:
Mitosis is a biological process that the cells of all organisms go through in order to replicate and reproduce. It is part of the cell cycle, which is made up of G1, S, G2, and M (mitosis). In G1, the cell is growing; in S, the DNA of the cell is synthesized, or replicated, so we know choice C is wrong; in G2, the cell is being prepared for mitosis; and finally, in M, the cell actually undergoes cell division.
So, we are looking for an answer choice that involves division: either A or D.
At the end of mitosis, there's an additional process called cytokinesis that actually divides the cytoplasm, so the answer can't be D.
Thus, the answer is A.
