B because organs help digest food, breathe, and help get rid of bacteria.
Answer:
DNA strands consists of four nitrogenous bases, pentose sugar and a phosphate group. The DNA strands are complimentary with each other as thymine binds with adenine with two hydrogen bonds and guanine binds with cytosine with three hydrogen bonds.
The given DNA strand for cystic fibrosis is 5'......ATAGCAGAGCACCATTCTG.....3'. Its complimentary DNA strand in 3'......TATCGTCTCGTGGTAAGAC......5'. The DNA strands of 5'.....CAGAATGGTGCTCTGCTAT........3′. The dots before and after the given sequence represent that the given strand is a shirt stretch of the DNA made of large number of nucleotides.
1) The level of Carbon dioxide grows with the emission of CO2 by humans, animals and by human activity but it's kept stable by the process of photosynthesis, for which plants need carbon dioxide, so they consume it
2) Oxygen is consumed by humans and animals, so its level would go down, but again: plants create new oxygen through photosynthesis
So the answer is: plants that undergo photosynthesis
Answer:
Actin accounts for the fact that in the protein content of a cell it always represents a high percentage and its sequence is very conserved, that is, it has changed very little throughout evolution.2 3 For both reasons it can be said That its structure has been optimized. Two peculiar characteristics can be highlighted on this: it is an enzyme that hydrolyzes ATP, the "universal currency of energy" of biological processes, doing so very slowly. But at the same time it needs that molecule to maintain its structural integrity. It acquires its effective form in an almost dedicated folding process. It is also the one that establishes more interactions with other proteins of how many are found, which allows it to perform the most varied functions that reach almost all aspects of cell life. Myosin is an example of a protein that binds actin. Another example is viline, which can interweave actin into bundles or cut actin filaments, affect the concentration of calcium cation in its environment.4
Forming microfilaments in a dynamic process provides a scaffolding that gives the cell a way to quickly remodel in response to its environment or body signals, for example, improves the cell surface for absorption or adhesion supports cells to form tissues. Other enzymes, organelles such as cilia, can be anchored on this scaffold, directing the deformation of the external cell membrane that allows cell ingestion or cytokinesis. It can also produce movement, either by itself or by molecular motors. Thus contributing to processes such as intracellular transport of vesicles and organelles and muscle contraction, or cell migration, important in embryonic development, wound repair or cancer invasiveness. The evolutionary origin of this protein can be traced in prokaryotic cells, where equivalents exist. Finally it is important in the control of gene expression.
A good number of diseases are based on genetic alterations in alleles of the genes that govern the production of actin or its associated proteins, being also essential in the process of infection of some pathogenic microorganisms. Mutations in the different actin genes present in humans cause myopathies, variations in cardiac size and function and deafness. The components of the cytoskeleton are also related to the pathogenicity of intracellular bacteria and viruses, especially in processes related to the evasion of the immune system response
Answer:
the diversification of a group of organisms into forms filling different ecological niches.
Explanation: