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bearhunter [10]
3 years ago
7

How long does a regular menstrual cycle last?

Biology
2 answers:
natima [27]3 years ago
6 0
Lasts about five to seven days

yaroslaw [1]3 years ago
4 0
The average amount of time for a regular menstrual cycle is about 28 days.
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Which is the most diverse group of seedless vascular plants?
Soloha48 [4]

Answer:

The most diverse group of seedless vascular plants are <u>the ferns .</u>

Explanation:

Ferns -

Ferns are the most advance seedless vascular plants and is the most diverse group . Ferns have branching roots and large leaves . But the whisk ferns , have lack of roots and leaves due to evolutionary reduction . In the process of evolutionary reduction , the natural selection reduces the size of the structure which no longer favors the particular environment . Hence , Photosynthesis in whisk ferns takes place in their green stem .

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3 years ago
Proteoglycans are a group of macromolecules formed from: a. proteins and glycosaminoglycans. b. proteases and glycosaminoglycans
Marianna [84]

Answer:

Proteins and polysaccharides.

Explanation:

Proteoglycans are heavily glycosylated proteins. These proteoglycans are present in the extracellular matrix of the animal cells and acts as a lubricant for the cells.

Proteoglycans are proteins that are covalently bonded with muco polysaccharidse. Proteoglycans are formed by the bonding between proteins and carbohydrates ( polysaccharides). Proteoglycans can combine with collagen to form cartilage and may affect the stability of a protein.

Thus, the correct answer is option (E).

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3 years ago
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Ya i’ll do it for you
8 0
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During telophase
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this part of the stomach contains thick muscle to mix the food and move the food into the duodenum. it is called _____.
Alla [95]

Answer:

Pylorus

Explanation:

The stomach is a J-shaped organ which is a part of the digestive system. The digestive system on one end is attached to the oesophagus and on the end to the small intestine.

The pylorus structure of the stomach is composed of thick muscles which help to mix or agitating the food in the stomach and controls the movement of the food to the duodenum which is the first part of the small intestine. The movement is controlled by the ring of muscles in the pylorus called pyloric sphincter.

Thus, Pylorus is the correct answer.

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3 years ago
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