When a small populations' gene frequencies are changed drastically by chance alone it is called a genetic drift
After a caterpillar eats a leaf, it can convert the chemical energy into mechanical energy to help it build a cocoon.
Answer:
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Explanation:
All three have sacs known as alveoli just beneath their plasma membranes.
The answer is C. Output device
Answer:
LD50 (median lethal dose)
Explanation:
- Whenever one needs to quantify the virulence of a pathogen then this is done by using a set of laboratory animals.
- LD50 (median lethal dose) is an important indicator of virulence.
- LD50 is defined as the number of pathogens that are required to kill 50% of the total infected animals.
- For the calculation of LD50, the animals are infected with a known number of pathogens and then a graph is plotted for the percentage of animals killed against the concentration of the pathogen used for infection.<em> The point at which the graph indicates the death of 50% animals, the corresponding concentration of inoculation of a pathogen is taken as the LD50 of that particular pathogen. </em>
