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Answer:
True
Explanation:
Smiling is considered as a universal sign of happiness. Smiling is something that makes a person happy internally. During birth babies smile. Some people smile even during sleep. It has been observed that when people are exposed to something they love or enjoy, they usually smile such as song, music, old photographs etc. Smiling is not a learned behaviour , it is considered as a sign of pleasure and openness across various cultures.
Hence, the given statement is true
Domininant allels are represented in a Punnett square with a capital letter and recessive alleles are represented in a Punnett square with a lowercase letter.
Example: Dominant - T and Recessive - t
in a hypertonic solution, water leaves a cell by osmosis, causing the cell to shrink. In the hypotonic solution the concentration of dissolved substances is lower in the solution outside the cell than the concentration inside the cell. Therefore, there is more water outside the cell than inside.
Answer:
The main function of stomach is to serve as a temporary storage chamber and primarily breaks down food by mechanical means.
Explanation:
The stomach is a muscular organ located on the left side of the upper abdomen.It secretes acid and enzymes that digest food.The stomach muscles contract periodically, churning food to enhance digestion (breaking down of food by mechanical means). The stomach is made up of several layers of tissues
The mucosa (mucous membrane) is the inner lining of the stomach.
Next is the sub mucosa.
The muscularis propria (or muscularis externa) is the next layer that covers the submucosa. It is the main muscle of the stomach and is made up of 3 layers of muscle.
The serosa is the fibrous membrane that covers the outside of the stomach.
The stomach has 3 main functions:
1.temporary storage for food, which passes from the esophagus to the stomach where it is held for 2 hours or longer
2.mixing and breakdown of food by contraction and relaxation of the muscle layers in the stomach
3.digestion of food
The stomach secretes various secretions containing enzymes which breaks down food chemically and the muscles mechanically break down the food.Food is broken down into a thick, acidic, soupy mixture called chyme, which enters the intestine.
