reduce
eliminate
duplicate
shape
B. drawing a conclusion
c. predicting a relationship
D. making an observation
Answer:
D
Explanation:
Observation is the first step to every scientific discoveries. From observation we form hypothesis [ intelligent guesses]; from that we subject our hypothesis to testing and the list goes on.
The correct answer is biological.
When any pathogen invades the body, it has to pass several line of defence. The first barrier is skin and mucous membrane which is a physical and chemical barrier. The second line of defence is non specific response by macrophages, neutrophills and interferon. After crossing these two barriers the third line of defence comes into action in which, the B- cells and T-cells acts specifically on the pathogen and destroys it.
The body will use the biological immune responses to destroy the disease-causing bacteria which crosses the first and second lines of defense.
The immune system is the system of organs and tissues as well as cells which work together to protect the body from diseases.
The first line of defence of the immune system is the skin an mucous membranes.
The second line of defense is the macrophages.
The third line of defense is the immune cells such as B-cells and T-cells which are biological immune responses.
Therefore, the body will use the biological immune responses to destroy the disease-causing bacteria which crosses the first and second lines of defense.
Learn more about immune system at: brainly.com/question/26285919
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Answer: All of the above
Explanation:
The living component of the ecosystem consists of both living and non living components. The living components of the ecosystem consists of plants and animals.
The non-living components of ecosystem consists rocks, river, soil et cetera. The living components of the ecosystem needs to depend on the non living and living components.
The phosphorous, nitrogen and carbon cycle are important for the living components of the ecosystem.
covalent
ionic
chemical
3. Not all cells have receptors for the molecule.
The main reason a signaling molecule is not receive by every cell nucleus is that not all cells have receptors for that particular molecule. Cells have specific receptors on their surface to recognize and respond to their corresponding signaling molecule. Cells that lack the specific receptors for a given signaling molecule will not respond to it, regardless of the size of the cell nuclei or other factors such as the stability of the molecule itself.