For a molecule to be considered organic what elements must be present? A. Carbon only B. Oxygen and hydrogen C. Carbon and hydrogen D. Carbon and oxygen

Answer: The basic tissue structure of the mucosa layer of the alimentary canal consists of:

--> mucous membrane

--> lamina propria

--> muscularis mucosa

Explanation:

The MUCOUS MEMBRANE forms the innermost layer of the alimentary canals which includes the stomach and the duodenum (small intestine) . It's major functions is protection, secretions and absorption. The type of mucous membrane found in the stomach and duodenum is the Columnar epithelial cells. Not numerous gastric glands are situated below the surface in the mucous membrane of the stomach. They consist of specialised cells that secrete gastric juice that aids in the digestion of food. While the duodenal mucosa consists of mucous producing goblet cells. These cells produce a viscous, alkaline mucus that protects against the acidic gastric juices and pepsin. The folding of these mucosal cells (microvilli) provides a large surface area to optimize nutrient absorption.

The LAMINA PROPRIA: This layer separates the mucous membrane and the muscularis mucosa. It is made up of connective tissues which supports the blood vessels that nourishes the inner epithelial layer. In both the stomach and duodenum, digested nutrients are absorbed into the capillaries.

MUSCULARIS MUCOSA: This is made up of thin layer of smooth involuntary muscles. The contraction and relaxation of these muscle layers occurs in waves, which push the contents of the tract onwards. This type of contraction is called peristalsis which occurs in the duodenum. While in the stomach, these muscles allows for the churning motion characteristic of gastric activities.

Final answer:

The mucosa layer in the alimentary canal comes into direct contact with food and consists of three layers: epithelium, lamina propria, and muscularis mucosae. The stomach mucosa secretes mucus, hydrochloric acid, and digestive enzymes, while the duodenum's mucosa contains glands that neutralize stomach acid, protecting the intestinal wall and enabling absorption.

Explanation:

Basic Histological Structure and Uniqueness of the Mucosa in the Alimentary Canal

The mucosa layer in the alimentary canal is the innermost layer that comes into direct contact with food. This layer consists of three sublayers: epithelium, lamina propria, and muscularis mucosae. The epithelium is made up of simple columnar cells responsible for secretion and absorption. The lamina propria is composed of loose connective tissue supporting the epithelium, and the muscularis mucosae is a thin layer of muscle that causes local movement of the mucosa.

The mucosa in the stomach has a special epithelium that secrets mucus, hydrochloric acid, and digestive enzymes, aiding in both protection and the breakdown of food. Its unique feature is the presence of gastric pits and parietal cells that secrete hydrochloric acid.

In contrast, the mucosa in the duodenum, part of the small intestine, contains Brunner's glands which produce an alkaline secretion rich in bicarbonate and mucus. The purpose of this is to neutralize stomach acid and protect the intestinal wall, enabling absorption to take place.

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Answer: A) Hair and D) Mammary glands

Explanation:

 Synapomorphies of mammals are hair and mammary gland as, mammals are the distinct from the other tetra-pods having hair,mammary gland and three bone ear.  The three unique trait of mammals included three bones ear malleus,stapes and incus, presence of the hair and mammary gland for the production of milk.

Answer:

the answer is B. C horizon

Explanation:

AP3X

Ans.

Carbon is one of the four most important atoms found in cells of all living organisms and is a major constituent of biomolecules, such as carbohydrates, proteins, and fats.

When the deer is killed and eaten by the mountain lion, its dead remains are eaten by some other animals, such as vultures, jackals, and wild dogs.

These organisms that feed on dead organisms are known as scavengers. Hence, the carbon present in deer carcass would be incorporated into scavengers.

Thus, the correct answer is 'option). B.'

The answer is  a.  It would be incorporated into other organisms.

Answer:

1. A letter to the reader outlining each portfolio item
2. A list of term definitions that will be helpful to readers
3. A collection of individual goals for the year, selected and updated by students monthly, quarterly, etc.
4. Graphics—charts, concept diagrams, timelines, photographs, etc.—showing important data such as test scores
5. Book excerpts or quotations chosen by the student
6. A chart tracking every free-choice book a student has read that year
7. Reading logs
8. Photographs of students working
9. Anecdotal notes from one-on-one or small group time with students (e.g. guided reading notes)
10. Video recordings of readings or performances (for ePortfolios)
11. A sample paragraph of writing featuring a few key writing techniques
12. Sample essays of various types—descriptive, narrative, explanatory, expository, persuasive, cause and effect, and compare and contrast are all good options
13. Technical writing such as a process analysis essay featuring student-drawn diagrams
14. Creative writing samples, including stories, poems, songs, and scripts
15. A collection of graded math quizzes showing performance trends