Answer:
Generally, a solid changes into liquid and then into gas state.
But the process of transistion of solid directly into gas without passing throuhg the intetmidiate stage, liquid is called sublimation.
Some of uses of sublimation are:
- Sublimation helps to dry substance within getting moist. This process of sublimation is also beneficial in medicine.
- Piriciple of sublimation is used in air freshener solids used in room and toilets.
- Dry ice is the solid form CO2 gas whose sublimation is used as cooling agent and storing dead bodied.
- Camphor, a substance used in houseold sublimes to give a pleasant smell inside the house.
A mutant protein is the protein product encoded by a gene with mutation. Mutated protein can have single amino acid change (minor, but still in many cases significant change leading to disease) or wide-range amino acid changes by e.g. truncation of C-terminus after introducing premature stop codon.
Explanation:
The allele for sickle cell would gradually be eliminated from the populations over generations. This is because while initially natural selection favoured and fitted the allele in the environment because its bearers are less vulnerable to malaria, sickle cells also result in reduced capacity of the red blood cells to carry oxygen to tissues. Therefore in the absence of Malaria, sickle cell would thereby offer a disadvantage to an individual hence be eliminated by natural selection.
Answer:
detail is given below.
Explanation:
The charged particles of nucleus are protons while neutrons are neutral having no charge.
We know that an atom consist of electrons, protons and neutrons. Neutrons and protons are present inside the nucleus while electrons are present out side the nucleus. Electron has a negative charge and is written as e⁻. The mass of electron is 9.10938356×10⁻³¹ Kg . While mass of proton and neutron is 1.672623×10⁻²⁷Kg and 1.674929×10⁻²⁷ Kg respectively.
Symbol of proton= P⁺
Symbol of neutron= n⁰
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons.
one proton contribute 1 amu to the total weight. There are 20 protons and 20 neutrons in Ca thus its atomic mass is 40 amu.
While the atomic number is 20.
True. NH4CL is an ionic compound, and salts are strong electrolytes.
