Answer:
They attach at the kinetochore. Which can be a disk or a protein.
The answer is A. It twirls like a helix and has 2 strands
In fetal life, the lungs are not expanded, so most of the blood from the right ventricle is shunted from the pulmonary artery to the aorta through the patent ductus arteriosus. With a few breaths the lungs expand, and blood flows from right ventricle to pulmonary artery into the lungs. Withdrawal of circulating prostaglandin from the mother plus bradykinins released from the expanding lung of the infant cause the ductus to close over a few minutes to hours. The closed ductus remains as the ligamentum arteriosum.
Explanation:
Endoplasmic reticulum is one of the cell organelles found in the cytoplasm of the cell. It is an important cell structure. It is made up of folded membranes.
- In the endoplasmic reticulum protein is synthesized.
- It helps in the transport of protein molecules to the golgi apparatus.
- Protein is usually folded in the endoplasmic reticulum.
Learn more:
Endoplasmic reticulum brainly.com/question/2622106
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Chemoreceptor is a specialized sensory receptor cell, which responds to a chemical substance and generates a biological signal.
The type of chemoreceptor responsible for our sense of smell is called olfactory receptor. It is also known as odorant receptor, these are found in a small patch of tissue high inside the nose. These cells directly connected to the brain.
