Scientists prove their hypothesis is true about Scientists can never "prove" their hypotheses are true, because some future experiment, possibly using new technology not currently available, might show the hypothesis to be false after all.
Answer:
Meiosis occurs in a series of different phases and creates genetically unique reproductive cells. The process which helps make meiotic cells genetically different and occurs during prophase I, but not during prophase II, is crossing over (C). Crossing over is the exchange of genetic material between two homogenous chromosomes. It is one of the final phases of prophase I. This process is called synapsis. It occurs when the matching regions on the matching chromosomes break and then reconnect to the other chromosome
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Answer:
The Sun accounts for 99.86% of the mass in the solar system, Moon is Earth's only permanent natural satellite, Earth's rotation is gradually slowing.
Answer:
C.Mature secretory vesicles
Explanation:
Hello!
Insulin is synthesized in pancreatic ß-cells. It is a small protein formed by two amino acid chains (A-chain, 21aa, and B-chain, 30aa) connected by two disulfuric chains.
The gene encoding is located in the short arm of chromosome 11. Its precursor, called preproinsulin, is synthesized in the endoplasmic reticulum. Right after its synthesis, this protein undergoes enzymatic cleavage to proinsulin (86 aa).
The prohormone is packed in small granules within the Golgi complex, that migrates to the cell surface. As the granules mature, 3 proteases split the proinsulin into equal amounts of insulin and C-peptide.
These secretory granules are stored within the intracellular space until their contents are released by exocytosis.
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<em>Image from Guyton and Hall Textbook of Medical Physiology, unit XIV, chapter 79</em>
its A im pretty sure it is