The answer is C, When the hemisphere is tilted toward the sun and the sun reaches its lowest point in the sky.
Answer:
<u><em>External Factors:</em></u>
The external factors which influence the cell cycle might be physical or chemical.
Physical factors: Physical signals involve the factors like when a cell touches another cell, it stops dividing.
Chemical factors: Chemical factors are the growth factors or growth proteins that trigger the cells to undergo the process of cell division.
<u><em>Internal factors:</em></u>
Kinases: Kinases are the proteins which determine whether the cell will undergo cell division or abort it.
Cyclins: When the signal is right for cell division, cyclins activate the kinases.
Answer:
Accepted.
Explanation:
As mentioned in the question that a new theory is agreed upon by a vast majority of scientists worldwide. Theory can simply be considered as a set accepted propositions or facts that try to provide an explanation of causes behind a certain phenomenon.
In this case, if vast majority of the scientists believe a particular theory, it is likely to be accepted and can lead to formulation of a scientific law in future.
For example: Mendel's theory of segregation and independent assortment were presented but many scientists did not believe it in start, it took a long time for scientists to accept the theory and ultimately when it was transformed into scientific theory.
Hope it helps!
Answer:
RNA
Explanation:
Most genes contain the information needed to make functional molecules called proteins. (A few genes produce regulatory molecules that help the cell assemble proteins.) The journey from gene to protein is complex and tightly controlled within each cell. It consists of two major steps: transcription and translation. Together, transcription and translation are known as gene expression.
During the process of transcription, the information stored in a gene's DNA is passed to a similar molecule called RNA (ribonucleic acid) in the cell nucleus. Both RNA and DNA are made up of a chain of building blocks called nucleotides, but they have slightly different chemical properties. The type of RNA that contains the information for making a protein is called messenger RNA (mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm.
Translation, the second step in getting from a gene to a protein, takes place in the cytoplasm. The mRNA interacts with a specialized complex called a ribosome, which "reads" the sequence of mRNA nucleotides. Each sequence of three nucleotides, called a codon, usually codes for one particular amino acid. (Amino acids are the building blocks of proteins.) A type of RNA called transfer RNA (tRNA) assembles the protein, one amino acid at a time. Protein assembly continues until the ribosome encounters a “stop” codon (a sequence of three nucleotides that does not code for an amino acid).
The flow of information from DNA to RNA to proteins is one of the fundamental principles of molecular biology. It is so important that it is sometimes called the “central dogma.”
Ionic Compound The other answer is wrong So hope this helped