Answer:
Acids or bases can be tested by chemical indicators.
Explanation:
A chemical indicator can be described as a paper substance which changes colour when dipped in an acidic or basic solution. It can be described as a chemical indicator for hydrogen ions (H+) and hydronium ions (H3O+).
Acidic solutions normally dive red-orange colours depending on the acidicity of the substance. The basic solutions give blue-violets colours depending on the basicity of the substance.
There are 5 levels of body organisation, which include, cell, tissue, organ, organ system and organism. The cells together make up the tissues; the tissues together make up the organs. The organs make up the organ system, and the organ system make up a complex organism.
The human stomach is made up of tissues. It is an organ. Arachnoidiscus ehrenbergi also shows an organ level organisation.
So, the correct answer is Organ.
Answer:
When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. ... It is obviously another source of genetic variation in offspring.
Explanation:
i looked it up on google
The minimum hydrogen to helium ratio is 3:1
