<span>The best source of stem cells which also minimizes the risk associated with stem cell transplantation</span> are stem cells preserved from the umbilical cord of the person. <span>Stem cell transplant is the process in which diseased cells are replaced by the stem cells collected at the time of birth from umbilical cord blood or bone marrow.</span>
Ovulation is triggered by peak concentrations of luteinising hormone peptide secreted into the blood, which is option B.
<h3>What is ovulation?</h3>
Ovulation is the release of an ovum from an ovary.
Luteinising hormone is produced by anterior part of the pituitary gland and stimulates ovulation and the development of the corpus luteum in female mammals.
The luteinizing hormone is released in by the pituitary gland of the brain, which triggers the ovulation.
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Answer:
An arctic fox changes its fur color to blend in with its surroundings
Explanation:
This is a defense mechanism because when it blends into its surroundings it can hide from its predators and help defend itself
Only phylum bryozoans were not present during Cambrian period. It is an extensive fossil that did not appear in Cambrian nor pre-cambrian rocks. Bryozoans are found in the early Ordovician period. It could have probably existed during the Cambrian period but were soft-bodied or not preserved.
Red and white blood cells are produced in bone marrow.
