Answer:
1.
Nearly all helium on Earth is a result of radioactive decay. The decay product is primarily found in minerals of uranium and thorium.
In what is called radioactive emission of "alpha particles" the atom of, say uranium, spits out particles in the form of two protons and two neutrons--a helium nucleus.
2.Helium is obtained through natural gas as it is extracted from the ground. The helium is a result of the decay of thorium and uranium. As these elements decay, they release an alpha particle. That alpha particle is the nucleus of a helium atom.
3.Natural gas is separated into its major components through a distillation process known as fractional distillation. Sometimes this name is shortened to fractionation, and the vertical structures used to perform this separation are called fractionating columns. In the fractional distillation process, the nitrogen and methane are separated in two stages, leaving a mixture of gases containing a high percentage of helium. At each stage the level of concentration, or fraction, of each component is increased until the separation is complete.
Explanation:
Answer: It would unbalance the ecosystem.
Due to the fact that if some species die off, the other species that rely on those species for food or protection would loose that food/ protection which may lead to their extinction and their extinction would lead to another extinction and so on.
It would come from plants, or what you would call producers.
Niether. They were both hit with the same effort. therefore niether.
Answer:
E.bind to complementary regions of target mRNAs
A.The rate of accumulation of the polypeptide encoded by the target mRNA is reduced.
Explanation:
A researcher introduces double-stranded miRNA into a culture of mammalian cells and can identify its location or that of its smaller subsections experimentally, using a fluorescent probe. Sometime later, she finds that the introduced miRNA separates into single-stranded RNAs, one of which is degraded. Use this information to answer questions 1 and 2.
microRNAs (miRNAs) are a class of ∼22-nt noncoding RNAs(Ribonucleic Acids) that regulates gene expression in plants and animals. Precursor miRNA hairpins are mostly cut by Dicer in the cytoplasm to manufacture a double-stranded. when a double stranded miRNA separates into single stranded RNAs it is actually that it is attached to the complementary region of target mRNA
When she finds that the introduced miRNA separates into single-stranded RNAs, what other evidence of this single-stranded RNA activity can she find?
it means that:
The rate of accumulation of the polypeptide encoded by the target mRNA is reduced.