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
Semenov [28]
3 years ago
14

A scientist conducts a test and finds out that the LD50 of a certain chemical is 20 mg per kilogram. Explain what this means.

Biology
1 answer:
RideAnS [48]3 years ago
7 0
The short answer is: The scientist means that a dose of 20 mg per kilogram is enough to kill one half or fity percent of the animals used in the test. LD stands for leathal doseage. The 50 means 50 percent. Subsequently a dose of 20 mg per killogram has a lethal dose that will kill 50% of the test subjects.
You might be interested in
What organelles found in plant and animal cells are also found in bacterial cells?
KonstantinChe [14]
DNA, ribosomes, cytoplasm
6 0
3 years ago
Which of these energy resources was not created by the Sun’s energy
Alex17521 [72]
  i would say coal because coal is found by mining which does not involve the sun's energy
8 0
3 years ago
Which is a process that eliminates harmful alleles from a gene pool?
Semmy [17]
Negative selection (D) removes the harmful alleles.
8 0
4 years ago
Read 2 more answers
4. Haploid cells have
Lisa [10]

Answer:

Haploid cells contain a single set of chromosomes. Gametes are an example of haploid cells produced as a result of meiosis. Examples of gametes are the male and female reproductive cells, the sperm and egg cell respectively.

Explanation:

Haploid describes a cell that contains a single set of chromosomes. The term haploid can also refer to the number of chromosomes in egg or sperm cells, which are also called gametes. In humans, gametes are haploid cells that contain 23 chromosomes, each of which a one of a chromosome pair that exists in diplod cells.

3 0
3 years ago
Please I need as much help as possible as quick as possible!How would you compare a plant cell to earth?
timama [110]
You could say the core of the earth is equal to the nucleus of the cell and the outer layer of the earth is like the cell wall
7 0
3 years ago
Other questions:
  • how would a change in the sequence of nucleotides in a DNA molecule affect the mRNA transcribed from the DNA molecule?
    5·2 answers
  • Imagine that a newly discovered, recessively inherited disease is expressed only in individuals with type O blood, although the
    15·1 answer
  • What is the largest time period in the history of Earth?
    8·2 answers
  • How many capillary beds does a red blood cell in the hepatic portal vein pass through before reaching the heart?
    6·1 answer
  • Yeast cells reproduce quickly by budding. This is a form of ___________ reproduction so all the yeast cells ____________.
    5·1 answer
  • which of the following is a correct statement about the events of the cell cycle? 1)Little happens during the G1 and G2 phase. 2
    7·1 answer
  • How penicillin discovered in your own words??​
    6·1 answer
  • Which of the following describes the relationship between elements of an ecosystem
    14·1 answer
  • Question 1
    9·1 answer
  • What happens when you have low enzyme production?.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!