crown

Subject:

damage caused to the vegetation when it is intensively fed upon by grazing animals and does not...

Subject:

two species that interact symbiotically in a relationship that is beneficial to both species....

hayfever

Subject:

allergic reaction to certain allergens such as pollen. It causes sneezing, a runny nose and...

glucagon

Subject:

hormone produced by the pancreas, which catalyses the conversion of glycogen to glucose.

Subject:

outside the cells.

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