If you had attached some options to choose it would have been much easier to give you the correct answer. Anyway, I think I know what you are talking about. So, as far as I concerned the <span> phenomenon which occurs when a particular allele will either be expressed or silenced, depending on whether it is inherited from a male or a female is called </span>genomic imprinting.
Explanation:
Human health ultimately depends upon ecosystem products and services (such as availability of fresh water, food and fuel sources) which are requisite for good human health and productive livelihoods. Significant direct human health impacts can occur if ecosystem services are no longer adequate to meet social needs.
Answer:
water is positively charged
A strand of mRNA is the compliment to the coding strand of DNA. It kind of has the opposite information from DNA (if a DNA strand is TCCGATC the compliment mRNA would be AGGCTAG). This way, it is able to retain the information when travelling to the ribosome for translation (aka, turning the DNA information in proteins)
