exam 2 Flashcards
(19 cards)
define and give examples of combination
2 or more substances combined together
eg A + B – AB
c+ 02 = c02
define and give examples of decomposition
a breakdown of a substance
eg AB=A+b
c02 =c+02
define and give examples of precipitation
it is where a solid is formed
eg A(l) + B(l) = C(s) + D(l)
AgNO3 (aq) + KCl (aq) → AgCl (s) + KNO3(aq)
define and give examples of neutralisation
is when an acid and a base react to form water to netrulazize the reaction
eg acid + base = salt + water
define and give examples of combustion
, combustion involves a reaction between any combustible material and an oxidizer to form an oxidized product
what is mitosis
normal cell division - where 1 cell of a full number of chromosomes (46) divide to produce 2 new cells also with full number of chromosomes
what is meiosis
cells Divison - to make cells for sexual reproduction eg 1 cell of full no. of chromosomes divides to produce 4 cells with 1/2 the no. of chromosomes
define mutatiin
a random event that changes the genetic structure.
preventipon of crossion
Turn to non-corrosive metals such as aluminum and stainless steel.
Keep the area around the metal surface dry.
Use drying agents and moisture barrier products
what DNA discovery happened in 1859
In 1859, Charles Darwin The Origin of Species,
1953 DNA
1953 - James Watson and Francis Crick discover the double helix structure of DNA
late 1952 DNA
rosline franklin recorded a especially clear x-ray diffraction
single point mutations
Result in an amino acid change.,
how does down syndrome occur
random event during cell division early in fetal development
1911 dna
Thomas Hunt Morgan
Linear genes discovered in chromosomes
effects of chromosomal mutation
breakage of a chromosome in which the genetic material becomes lost during cell
what happened in 1944
aswand lavery shows evidence of the dna as the carrior of genitic information
what is a chromosome
The chromosomes of a cell are in the cell nucleus. They carry the genetic information.
what is fertilisation
breaks down into a simpler substance.
