Mucous secretions in the respiratory tract inhibit microbial infections. these secretions are produced by which of the following tissue types found in the lungs?

The correct answer is - epithelial tissue.

Explanation:

Mucous secretions are are essential in the immune response as it inhibits the microbial infections such as the bacteria or trap the dust particles that are present in respiratory tract.

Respiratory tract have epithelial tissue that contains cilliated cells or occasionally goblet cells. These cells are secrete mucus that moistens the epithelial cell surface and traps or adhere to the particles or microbes.

Thus, the correct answer is - epithelial tissue.

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.