Al Techno Zone

Ben Underwood Human with a Sonar Vision - Ben Underwood is a blind American teen who uses echolocation to move around avoiding obstacles.

Ben Underwood is blind, his eyes had been damaged by cancer, when she was 3 years old. However, he plays basketball, rides on a bicycle, and lives a quite normal. He trained himself to use sonar waves to navigate around the world, without a guide dog to lead him, without a hand to touch-touch, he uses SOUND!

Ben produces sound then bounces on an object and echoes it back to him. He was one-the only person in the world who look at using sonar sound like dolphins-dolphins, sea vessels, and bats.


Human echolocation is an ability of humans to detect objects in their environment by sensing echoes from those objects. By actively creating sounds-for example, by tapping their canes, lightly stomping their foot or making clicking noises with their mouths-people trained to orientate with echolocation can interpret the sound waves reflected by nearby objects, accurately identifying their location and size. This ability is used by some blind people for acoustic way finding, or navigating within their environment using auditory rather than visual cues. It is similar in principle to active sonar and to the animal echolocation employed by some animals, including bats, dolphins and toothed whales

Theword of auxin  was first used by Frits Went. the found that a compound causes bending coleoptile toward light. The bending of the coleoptile caused by cell elongation in terpacunya side attached pieces of agar containing auxin. Went auxin found now known as acid indole acetic (IAA). Besides IAA, plants contain three other compounds are considered as hormone auxin, which is 4-chloro indolasetat (4 chloro IAA) found in young seeds nuts, phenyl acetic acid (PAA) were encountered in many plant species,  and indolbutirat acid (IBA) which found in the leaves of corn and a variety of plant species
dicots.

Auxin plays a role in a variety of activities plants include:

Development of fruit

At the time of developing mature seeds , seeds issued auxin to the sections of interest that stimulates the formation of fruit. Thus, administration of auxin on flower are not pollinated will stimulate the development of the fruit seedless. It is called partenokarpi.

Apical dominance

Apical dominance is a shoot tip growth plants that inhibit the development of lateral buds in lower stem. Apical dominance is the result of downward auxin transport made ​​in the apical meristem.

Abscission

Young leaves and young fruits form of auxin, so that remained strong both attached to the stem. However, when reduced auxin formation, a layer of specialized cells formed in the base of the leaf stalk and the fruit so that the leaves and fruit fall.

The formation of adventitious roots

Auxin stimulates root formation that grows wild of stems or leaves of many species.

Heredity and Mutation - In the Subject field of the Natural Sciences Biology are terms that relate to Heredity and Mutation. What is the difference between heredity and mutation? Heredity is how information is based from one generation to the next; encoded in the DNA molecule. A mutation is a mistake that is made in the DNA. Most mutations have no affect, some are harmful, and a small number confer an advantage. Natural Selection works to eliminate the harmful and enhance the beneficial.

The following definition of terms related to the Heredity and Mutation:

1. Autosomal is a chromosomes outside of the sex chromosomes.
2. Dihybrid is a marriage by taking into account two different characteristics.
3. Agglutinin is a substance that can agglutinate red blood cells.
4. Aglutinogen is a red blood cell antigens that stimulate the formation of agglutinin. Used as the basis for the classification of human blood into types A, B, AB, and O.
5. The dominant phenotype is a characteristics that appears in F1, characteristics the win against a recessive characteristics.
6. Epistasis is an beralel gene interactions, with one covering the gene expression of other genes.
7. Phenotype is the appearance of characteristics as a result of interaction between the genotype with the environment.
8. Genotype is a characteristics that is determined by genes.
9. Haemophilia is a blood disease hard freeze.
10. Heterozygous is a genotype that composed of genes and alleles that are not the same, one dominant and the other recessive.
11. Kiasma is a connection there between homologous chromatids, where the exchange process in the event of crossovers.
12. Lethal is a gene that cause of death of the individual.
13. Monohibrid is a marriage by taking into account the different characteristics.
14. Mutagen is a chemical substance, biological or treatments that can increase spontaneous mutation.
15. Mutant is an organism mutate so different from other types.
16. Links is a gene that is adrift because it is located on an adjacent locus.
17. Crossing over is an emigration event from one chromosome to genes homologous chromosome as the locus apart. Occurs during meiosis.