1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sindrei [870]
3 years ago
15

The concentration of pathogen needed to kill 50% of an infected group of test animals is the __________.

Biology
1 answer:
natulia [17]3 years ago
6 0

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>
You might be interested in
Explain went experiment​
Leya [2.2K]

When Went placed the agar block on one side of the decapitated shoot, the shoot curved away from the agar as it grew. This demonstrated that some kind of hormonal signal had diffused into the agar from the coleoptile tips. ... Went's experiment represented the first time that anyone had isolated a hormone from plants.

6 0
2 years ago
Read 2 more answers
How does the Marburg virus compare to the coronavirus?
ahrayia [7]

Answer:

The Marburg virus wasn't mutating this early on, therefore the Coronavirus is much more deadlier and almost impossible to get a cure for, due to the rapid change in pathogens!

8 0
3 years ago
Read 2 more answers
Which is not true about spermatogenesis? the process takes place in the walls of the seminiferous tubules. mature spermatozoa ar
mixer [17]

 Answer: Spermatogenesis begins at birth and continues throughout a man's life.

The process in which haploid spermatozoa develop from germ cells in the seminiferous tubules of the testis is known as Spermatogenesis. Thus, the process of spermatogenesis start with mitotic division of the stem cells that is located close to the basement membrane of the tubules. However, a mature male gametes known as sperm but it is commonly known as spermatozoa.

4 0
3 years ago
What does the atomic mass of a element represent ??
BlackZzzverrR [31]

Answer:

ans is c is correct pls mark me as brainlist pls

6 0
3 years ago
Help me please. Due today.
Debora [2.8K]

Answer:

Okay! I will help! what is the question you need help with?

Explanation:

♡♡♡♡

8 0
2 years ago
Read 2 more answers
Other questions:
  • During photosynthesis, oxygen is converted to carbon dioxide.<br> True Or False?
    8·2 answers
  • Which of the following are secondary consumers?
    6·2 answers
  • The interaction between people and the wild plants and animals they eventually domesticated took place mainly in the well-watere
    12·1 answer
  • Why do volcanoes occur
    13·2 answers
  • Of the four most abundant gases in our atmosphere, which one shows the greatest variation at the earth's surface
    5·1 answer
  • Which state of matter is best as a thermal insulator? Give an example.
    13·1 answer
  • Akira creates a reaction without a catalyst, then repeats the reaction with a catalyst.
    10·1 answer
  • Are vesicles involved in passive transport? please explain​
    13·1 answer
  • After concluding his research, which statements would Virchow agree with? CHECK ALL THAT APPLY.
    7·2 answers
  • Cylindrical bacterial cells are called , whereas gently curved cylindrical cells are referred to as .:_________
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!