Answer: Option B
Explanation:
The disease like Hepatitis B may establish a chronic infection in which the disease can get transferred from one person to another even when the symptoms are not visible.
The disease can said to be completely controlled only when there is no carrier state left for the disease in the body of the organism.
The disease is more deadly when it is transferred without showing any symptoms in the body. It can eradicate only when there is no carrier of the disease for a very long period of time.
Answer:
You need a picture to answer this.
Explanation:
Answer:
Rain, sleet or snow
Explanation:
Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents. The SO2 and NOX react with water, oxygen and other chemicals to form sulfuric and nitric acids. These then mix with water and other materials before falling to the ground.
Answer:
Streptomycin and Erythromycine.
<u>Streptomycin:</u> inhibit protein synthesis by combining irreversibly with 30s subunit mRNA.Thus the normal synthetic sequences is disrupted.
Streptomycin does not stop protein synthesis in eukaryotic cells because it does not bind to eukaryotic ribosomes.
<u>Erythromycine:T</u>he Erythromycine inhibits protein synthesis through interference with the binding 50s subunit ribosome.
Erythromycin does not estop protien synthesis in eukaryotic cells because it does not binds to eukaryotic ribosome.Specificity towards prokaryotes relies upon the absence of 50S ribosomes in eukaryotes.
Antibiotics block processes that occur in prokaryotic cells but not in eukaryotic cells that's why they not affect ekaryotes.
Explanation:
Antibiotics are simply chemicals that kill prokaryotic cells but do not harm eukaryotic cells. They are natural chemicals produced by fungi and bacteria that act to control their bacterial competitors.
Antibiotics block processes that occur in prokaryotic cells but not in eukaryotic cells that's why they not affect eukaryotes.
There are different classes of antibiotics inhibit different steps of prokaryotic life cycle.
<u>Streptomycin and Erythromycin </u>are group of antibiotics that inhibit protein synthesis of bacteria.They are specifically effective against prokaryotes does not inhibit protien synthesis of eukaryotes.
Answer: i- fraternal or dyzygotic twins
ii- monozygotic twins
Explanation: dyzygotic twins develop when two separate oocyte are fertilised by two different spermatozoa. They are also referred to as nonidentical or fraternal twins. They can be of the same or different sex.
Monozygotic twins develop when one oocyte fuses with one spermatozoa and splits into two after fertilization. These twins are also known as identical twins as they will be of the same sex and have the same gene, blood groups and physical features. They may be of different sizes and often have very different personalities and characters.
