Mohamedsbkamara

Matter is any substance that occupies space Elements are unique forms of matter with specific chemical and physical properties that cannot be broken down into smaller substances by ordinary chemical reactions.

Across 1. protein that acts as a catalyst in biochemical reactions 6. component of fat molecule 8. acidic group in amino acids 9. monosaccharide commonly found in fruit 11. fatty acid with hydrogens in different planes 12. monomer subunit of protein 14. major constituent of plasma membrane 17. fatty acid containing no double bonds 18. nucleic acid found only in RNA 19. bond formed between two amino acids 20. number of amino acids

According to the new Science of Metagenomics: revealing the secrets of our microbial planets (2007) metagenomics is defined as the study of the structure and function of entire nucleotide sequences isolated and analyzed from every other organism in a bulk sample. Metagenomics can mainly be used to study specific community of microorganism more especially those residing in humans. Like the normal flora found in the stomach of human beings.

This is the process that involves the communication that happens within cells in which one cell produces an extracellular mediator that is require to bind with a receptors on the same cell to initiate signal transduction. Autocrine signaling is a type of cell communication that occurs when a cell secretes a substance that is capable of provoking a reaction in itself. Those substance secreted are also known as local mediators. This is because the only affects cell in their immediate surrounding (...

 Poor coordination and balance: during physical examination a patient suffering from SCAs cannot be able to coordinate movement of his index finger from the tip of his or nose to the one of the fingers of the examiner, poor swallowing.  Unsteady gait: abnormal coordination of working position or steps which is why patients of SCA are on a wheel chair especially when it suffices in their lives.  In the long term lead to breathing failure or cardiac malfunctioning because the neurons or...

PH which abbreviation means potential of hydrogen is used to measure the concentration of s Hydrogen ions in a given solution. H3O+ determines the acidity of a solution just like how OH- determines the alkalinity of a substance or solution. This is done by donating or dissociating a hydrogen ion. Diluting an acid increase the concentration of hydrogen ion in the solutions whereas diluting a base decreases the concentration of hydrogen ion in a solution and lowers the pH.

Organic evolution is defined as the sum total of adaptive changes from pre-existing or old form that have taken place over a long time, resulting in diversity of forms, structures and functions among organisms. The concept behind organic evolution is that all living things came into existence from preexisting living things and that the various species have arisen by a gradual process of change over a long period of time(Understanding evolution, n.d.).

Structural adaptive features to regulate body temperature in Mammals and birds Mammals and birds do regulate their body temperatures to maintain a constant body temperature in all weather conditions. Keeping the body temperature constant enables organs and tissues in the body to function well. Regulation of temperature in vertebrates is in two ways among two groups.

first endosymbiosis is when one symbiotic species is taken inside the cytoplasm of another symbiotic species and both become endosymbiotic. What happens is that two different species of prokaryotes fused together or simply when one species enter into the cytoplasm of another species through genome fusion. This will result in a specie (genome) having or inheriting the genes from the Endosymbiont and the host, a system refers to as the Endosymbiont Theory.

• Morphology: Arthropods differ from other organism by the shape of their bodies which is segmented. Attached to their bodies are jointed limbs. They also contain a pair of appendages and a body made up of external skeleton and chitin. Both sides of their bodies are symmetrical (the same).