Chromosomes are composed of deoxyribonucleic acid (DNA) mole
There are mainly two molecules that function as genetic material in living organisms.
These are ribonucleic acid(RNA) and deoxyribonucleic acid(DNA).
The organisms having DNA as genetic material require packaging of DNA as it is a long polymer of deoxyribonucleotides.
In the case of human beings, the length of DNA in a cell is approximately 2.2 meters which is very large as compared to the size of the nucleus( approximately 10^-6 meters).
So, the DNA has to be made compact for it to be present inside the nucleus of a cell.
Therefore, the DNA present inside the nucleus of a cell undergoes coiling and compaction through several stages before finally becoming a chromosome, which is shown in the adjoining diagram.
Thus, chromosomes are composed of deoxyribonucleic acid (DNA) molecules.
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Well they share the function of giving nutrition to the buds and the leaves on the plant , but they preform this function in different way from each other
Answer:
anything contrary to the information provided below
Explanation:
Proteins determine the shape and structure of cells and the direction of almost all vital processes. Protein functions are specific to each of them and allow cells to maintain their integrity, defense of external agents, damage repair, control and regular functions, etc. selective binding to molecules. Structural proteins agree with other molecules of the same protein to cause a larger structure. However, other proteins bind to different molecules: antibodies to specific antigens, hemoglobin to oxygen, enzymes to their substrates, regulators of genetic expression to DNA, hormones to their specific receptors, etc.
Mutations and natural selection cause adaptations. Mutations can cause instant adaptations, while natural selection is the process by which adaptations occurs over a series of generations.
Adaptations are changes or processes of changes by which an organism or species becomes better suited for its environment.
A mutation is an alteration of the DNA sequence. Sometimes such alterations code for the same amino acid sequence as the unaltered DNA strand during protein synthesis. In such a circumstance, the mutation is not detectable. However, other mutations alter the genetic code in such a way that a noticeable change in the trait that is associated with that gene is visible. Sometimes such mutations are advantageous and improve the organism's ability to survive in its environment.
Natural selection is the process by which organisms with more advantageous traits (being camouflaged, being covered with the correct outer covering for the temperatures of that environment, stronger/ larger/ or faster to fight off or run from predators, etc.) are more likely to survive in a particular environment. Likewise, organisms less advantageous traits are more likely to die due to the pressures exerted by the environment (such as temperature, predators, illness, etc.). Therefore, the organisms with the advantageous traits that survive are more likely to survive to find a mate and reproduce. Thus, the advantageous traits are passed down to future generations.
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Answer: Tropical rain forests experiences no seasons because it is just hot all year round while temperate rain forests experiences four seasons. Tropics also receive the most sunlight in the planet while temperate rain forests receive light at a slanted angle.
