Answer: B
Explanation: It is the question 2 that can be answered using scientific process. scientists can better explain the effect of plastic bags on birds.
The other question can be answered by research or logics.
Answer:
Gene therapy is a medical field which focuses on the utilization of the therapeutic delivery of nucleic acids into a patient's cells as a drug to treat disease.
<h2>Mucosa layer</h2>
Explanation:
The mucosa is the innermost layer, and functions in absorption and secretion
- It is composed of epithelium cells and a thin connective tissue
- The mucosa contains specialized goblet cells that secrete sticky mucus throughout the GI(gastrointestinal)tract
- The mucosa is made up of three layers:epithelium,lamina propria and muscularis mucosae
- The epithelium is the innermost layer and it is responsible for most digestive, absorptive, and secretory processes
- The lamina propria is a layer of connective tissue that is unusually cellular compared to most connective tissue
- The muscularis mucosae is a thin layer of smooth muscle