Aug 26, 2024 · Have mosquitoes become silent and invisible, or am I losing my senses of hearing and sight? This summer I have seen no mosquitoes and have only heard two of them, very quiet, as I sat …

Jan 10, 2024 · You actually inhale and exhale both CO2 and O2, what changes is the relative amounts of each. Besides tiny percentages of various gases and non-gas particles, air contains primarily …

Jun 9, 2017 · The other answer is a bit misleading. "Another cause is the the intracellular K+ concentration" No, this is exactly the same cause, the differing concentrations is what causes the …

Jun 16, 2016 · Is there an agreed definition as to how many nucleic acid bases constitute a gene? If not, why not? I'm not sure I understand how the exact sizes of genes are defined.

Sep 15, 2015 · Most promoter elements are not a part of the mRNA sequence. They are upstream (towards 5') of the transcription start site. However, a certain class of promoters called downstream …

Aug 2, 2012 · I extracted RNA from different cell lines, an I want to perform reverse transcription and then PCR. To get good results, in which range should the absorption ratios 260/280 nm and 260/230 …

Nov 8, 2023 · I have performed DNA precipitation using two methods on an amplified 194 bp PCR product: using a PEG method with just cold 80% ethanol PEG worked much better for me. Can the …

Human body density is approximately 1 kg/l (same as fresh water) - which is not surprising (at first) given that we are 70% water, and is surprising (on a second thought), given that the other 30% ...

Nov 4, 2021 · Spiders’ ability to weave webs is a classic example of an innate or instinctual behavior. They do not learn to make webs. The earliest English-language scientific publication that I can find to …

Nov 9, 2022 · I want to emphasize that actual memories passed on genetically are pure fiction as far as we know. However, there are genetic markers such as methylations, induced as a part of stress …