Answer:
A.) Core
Explanation:
Core definition: a central and often foundational part usually distinct from the enveloping part by a difference in nature.
The answer is Vaccination.
Acquired or adaptive immunity is the body's third line of defense. This is protection against specific types of pathogens. Acquired immunity may be either natural or artificial in nature. Both natural and artificial immunity have passive and active components. Active immunity results from an infection or an immunization, while passive immunity comes from naturally or artificially gaining antibodies.
The Internal skeleton of the porcupine gives shape and structure to the porcupine.
The stem of the rose plant provides support to the plant and serves to transport nutrient and water in the plant.
<h3>What a skeleton?</h3>
A skeleton is a rigid structure found in living organisms which provide structure and shape to the living organism.
Skeletons are found in animals.
Skeletons present in animals are of two types:
- Internal skeletons also known as endoskeletons
- external skeletons also known as endoskeletons
The Internal skeleton of the porcupine gives shape and structure to the porcupine. It also serves as a point of attachment to muscles in order to enable movement.
Stems are present in plants.
Stems serve various purposes in plants such as:
- transport of nutrients and water
- storage of food and water
- provides support and structure to the plant.
Thus, the stem of the rose plant provides support to the plant and serves to transport nutrient and water in the plant.
In conclusion, the internal skeleton of animals and the stem of plants both provide shape and structure to the respective organisms.
Leran more about internal skeleton and plant stem at: brainly.com/question/840794
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