Potential energy is the stored energy in any object or system by virtue of its position or arrangement of parts. However, it isn't affected by the environment outside of the object or system, such as air or height. On the other hand, kinetic energy is the energy of an object or a system's particles in motion.
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Answer:
Calcium ions are necessary to activate the binding sites on the actin filaments. The molecule ATP is required each time the myosin head detaches from one site and reattaches to another.
Answer:
Low pressure systems lead to active weather like wind and rain, and also severe weather
Explanation:
BE CAREFUL. Here we ask about the nucleolus precisely and not about the nucleus in general, the precise role of the nucleolus is to assemble the ribosomal RNA and the ribosomal proteins to form the ribosomes. So the answer is B.
In cell biology, the nucleolus is the largest nucleus subcompartment of eukaryotic cells. This particular space of the nucleus is not delimited by a membrane, nevertheless some authors consider it as an organelle and others do not. The number of nucleoli can vary during the cell cycle (usually only 1 in G0 phase).
The nucleolus is composed of proteins, DNA and RNA and is formed around particular chromosomal regions called NOR (Nucleolar Organizing Regions).
It is in particular the place where the transcription of the ribosomal RNAs (5.8S, 18S and 28S rRNA), the processing of these ribosomal RNAs from precursors and the first part of the assembly of the two ribosome subunits takes place. with the association of certain ribosomal proteins. The end of the ribosome assembly occurs in the cytoplasm on mRNA after export of pre-ribosomes through the nuclear pore.
Answer:
<em>The correct option is C) High standards of journalism set by their newspapers</em>
Explanation:
William Randolph Hearst and Joseph Pulitzer were the leading newspaper owners of the 1890's who used melodrama, romance etc to expand the business of newspapers. Their style of newspapers came to be known as the yellow journalism. William Randolph Hearst and Joseph Pulitzer saw the conflict of the Spanish American War as a way to sell newspapers. However, many other journalists such as Frank Luther Mott identified yellow journalism to promote fake headlines and parade of false learning.