The correct answer is "is found only in Corynebacterium diphteriae cells that have been infected with lysogenic bacteriophage β".
An exotoxin is a bacterial toxin which is secreted by the toxin in its surrounding environment.
The diphtheria exotoxin is a toxin produced and secreted by some pathogenic bacteria of the species <em>Corynebacterium diphtheriae</em>. This exotoxin is only produced by bacteria who have been infected with lysogenic bacteriophage β (a specific type of virus which infects bacteria). The reason for this is that the virus encodes the gene responsible for producing the toxin.
Species evolve over time based on their environment.
If part of a group of a species gets isolated into a new environment, then both species (the initial environment and the new one) will evolve differently because of their different environments and in result become different.
So since they both evolve differently based on their different surroundings, the group that was isolated becomes a new species.
Answer:
d.) All of the above
Explanation:
Prophase is the first stage of mitosis. In this phase, the DNA condenses into chromosomes. The nuclear membrane breaks down, and the centrioles move to opposite sides of the cell.
The next phase is metaphase, where the condensed chromosomes move to the centre of the cell.
Next, during anaphase, the chromosomes are separated to either end of the cell
Finally, during telophase and cytokinesis, the nuclear membrane reforms and the chromosomes begin to decondense, and the cytoplasm splits to form two cells.
Answer:
True.
Explanation:
Earthquake proof buildings are those which have the ability to stand during an earthquake. Shock absorbers that is present between the building and the ground motion, able the building to remain upright during an earthquake. The shock absorbers has the ability to absorb all the disturbance produced in the building and for that purpose the building is safe.
Biotic- living abiotic- non living
Biotic: sharks, corals, seaweed
Abiotic: water, the temperature of the water
