Chromosome
The homologous chromosomes have the same genes in common.Each cell has at least two sets of chromosomes which one comes from one’s father also called as paternal chromosome and mother, called as the maternal chromosomes. These chromosomes are what makes the child obtain the characters and may depend on the traits the parents possess. Homologous chromosomes are not duplicated chromosomes or identical however, they are analogous or similar. The alleles for a specific characteristics isn’t the same but the same genes are in the same order.<span> </span>
The stubbing of the toe on the edge of the bedpost will result in the release of endorphins. Endorphins are the neurotransmitters that pass the nerve signals from one neuron to another. The endorphins are released in response to stimuli such as fear, pain and stress. These are released in the different parts of the nervous system, and the pituitary gland. The stabbing of the toe will act as a pain stimuli for the release of endorphins.
Hence, the answer is 'Endorphins'.
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You answered your own question wth :')
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D) Different adaptations gave some tortoises a better chance of survival.
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Chromatin refers to the dna and the proteins associated with it. It's the dna in the nucleus that is uncondensed.