Answer:
Chromatin is a substance within a chromosome consisting of DNA and protein. The DNA carries the cell's genetic instructions. The major proteins in chromatin are histones, which help package the DNA in a compact form that fits in the cell nucleus. Chromatin structure plays a key role in regulating gene expression by allowing DNA accessibility to transcriptional machinery and transcription factors.
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Answer: Respiratory gases(Oxygen)
Explanation:
The essential role of cadio vascular system is to supply blood; containig metabolites (glucose,amino acid, fatty acid and glycerol) and gases expecially Oxygen,needed for combustion of these nutrients(metabolites) in mitochondrial of cells (cellular Respiration) to generate ATPs for biochemical activities of the body.
I’m not too sure what geoscience is, is it like earth science or..? Anyways I took chemistry online this year and I think it’s ok to say I would have rather taken it in person, just because chemistry can sometimes be confusing -at least for me, and I’m generally a smart person oof. Ik my answer may be biased because i took earth science in middle school and chemistry now (10th grade), but I would say take chemistry. If you take chemistry now then a LOT of things will make sense and if you do geoscience in 11th grade or smth it may be a lot easier to understand.
If it hits a single atom, a "product" can be broken. But only until it is a single molecule will a "molecule" be separated. Of starters, oxygen, H2O, always appears like oxygen in millions. But if you split it into smaller and lesser parts, say half, you can divide it only until you get 2 hydrogen and 1 oxygen. It's no longer water if you divide it further. It's going to be another matter.
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We cannot directly observe a genotype because there are multiple options for genotypes.
