According to my knowledge there are many. Ribosomes, Centrioles, ER. <span>cellular structure is NOT surrounded by at least one membrane.</span>
Answer:
Explanation:
Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. As a result, the amount of carbon dioxide in the atmosphere is rapidly rising.
Somatic motor neuron stimulation doesnot cause the release of a hormone from an endocrine organ.
Somatic motor neurons innervate skeletal muscles not endocrine organs. They originate in the central nervous system (CNS) and project their axons to the muscles involved in locomotion (limbs, abdominal). These neurons are called efferent because they transport information from the CNS to the periphery.
Hormone release from an endocrine organ can be caused by:
• Levels of circulating ions-e.g. Ca ions control the release of parathyroid hormones from parathyroid glands
• Another hormone- e.g Thyrotropin-releasing hormone (TRH) from hypothalamus affect the release of Thyroid-stimulating hormone (TSH) from the pituitary gland which then affect the release of thyroid hormones T4, T3 from thyroid gland
• Neural reflex arc-e.g. Parasympathetic neurons increase insulin secretion.
NONDISJUNCTION EVENT DURING MITOSIS.
This is further explained as the failure in mitosis for the two members of a chromosome pair to separate (to disjoin) normally so that both chromosomes go to one daughter cell while none go to the other daughter cell. This results in the formation of an allopolyploid plant.
