Answer: Goblet cells
There are two main areas in the lungs that secrete mucus. From the trachea to the major bronchi ciliated cells and goblet cells are present in the epithelium cells. The surface of the epithelium cells are coated by a mucus layer of viscos elastic gel which acts as a protective barrier and is mobilized by ciliary movement. Mucins are secreted by goblin cells are a major component of the mucus. Mucus is composed of water carbohydrates proteins and lipids
One primary spermatocyte produces four spermatozoa, therefore, four primary spermatocytes will produce 16 spermatozoa.
Answer:
The statement ''there are lots of things that can be eaten and in many ways " is true.
There are lot of things to eat means, all the living beings rely on different sources of food and hence categorised as herbivores, carnivores and omnivores.
Food source such as plants can be eaten raw as well as cooked or some of the vegetable are eaten in liquid form as well. same with meat or animal source food, there are different ways to eat non-vegetraian food such as raw, steamed, and completely cooked.
Hence, it proves that ''there are lots of things that can be eaten and in many ways ".
Becuase there is a broad range of phenotypes for human height, the trait is an example of a polygenetic (poly = many, genetic = of genes) trait.
Due to the vast variations of human height, the trait is clearly not purely dominant or recessive. A dominant trait is due to a dominant allele (variation of a gene) which completely masks a recessive allele. If only dominant and recessive height phenotypes existed, there would only be two heights observed in humans!
Since there is such a vast variation amongst human heights, the trait is an example of a polygenetic trait. Polygenetic traits are traits that are influenced by more than one gene at multiple loci (locations) on one or more chromosomes. This results in a continuous distribution of traits within a species. Other examples of polygenetic traits include skin color, hair color, and weight.