Dog breeders make great efforts to breed dogs that are unrelated to the dog they are trying to breed. This is because closely related individuals are likely to share the same harmful gene.
Breeding is the intentional collection of dogs during the breeding season to allow the animals to mate and give birth. Do not underestimate the variety.
Most breeders recommend waiting for dogs to breed until they are at least 18 months old. Most strains are fully grown at this point, limiting the potential for complications. However, many very small varieties can grow after a year.
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Answer:
B. positive
Explanation:
Histones are proteins that bind to the DNA in order to form highly compacted structures named nucleosomes, the basic structural units of DNA packaging in eukaryotic genomes. A nucleosome is a segment of DNA wound around an octamer (8) of histones, i.e., two copies each of the histones H2A, H2B, H3, and H4. These histones are positively charged in order to interact with the negatively charged DNA molecule. During transcription, reducing histone positive charge decreases the interaction between DNA and histones in the nucleosomes, thereby opening the chromatin to favor the access of the transcriptional complex and thus facilitates gene expression.
Answer: Roots of trees need oxygen.