Answer:A concave mirror is a spherical mirror with the surface of reflection is curved in an inward direction while a convex mirror is a spherical mirror with a reflecting surface with an outward bulge.
Explanation:
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Answer:
(d). B-cells.
Explanation:
Adaptive immunity can be described as immunity which develops in response to exposure to a pathogen (or foreign molecule). throughout the life. It is divided into two types, humoral immunity and cell-mediated immunity.
Humoral immunity is mediated by B cells that secrete antibodies against particular antigens. These antibodies recognize and neutralize the antigens and activate cell-mediated immunity, which is mediated by T cells.
Thus, the correct answer is option (d).
The pair that incorrectly matches polymer-monomer is lipids-monosaccharides (option C).
<h3>What is a monomer?</h3>
A monomer is a small molecule which can be covalently bonded to other monomers to form a polymer.
A polymer, on the other hand, is a large molecule made up of a chain of many monomeric units, formed by chemically bonding together.
The following are the monomer-polymer combination we have in nature;
- Carbohydrates - simple sugar/monosaccharide
- Protein - amino acid
- Lipids - fatty acid
- Nucleic acid - nucleotide
Therefore, the pair that incorrectly matches polymer-monomer is lipids-monosaccharides.
Learn more about monomer at: brainly.com/question/18784783
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