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
Kay [80]
3 years ago
7

When is it more appropriate to use presumptive tests in a crime investigation? When is it more appropriate to use confirmatory t

ests in a crime investigation? Why is hemoglobin important for presumptive tests for the presence of blood?Describe how the Kastle-Meyer test is used to detect blood at a crime scene.
Biology
1 answer:
k0ka [10]3 years ago
7 0

Answer:Phenolphthalein is a presumptive test that reacts with the heme molecule present in blood. A positive reaction gives a pink color. While bloodstains normally appear red-brown in color, the color of the substrate or the age of a stain may affect the appearance or visibility of the stain.

Explanation:

You might be interested in
The same, unknown bacteria is isolated from 20 sick individuals. Their samples were grown in culture and then placed in 10 healt
AleksAgata [21]
<h2>Koch's Postulates.</h2>

Explanation:

The next step should be isolate the microorganism from the mice and check if it is identical to the original microbe.

According to Koch's postulates, a microbe can be considered as a causative agent of a disease only after all the following are established:

  • The microorganism should be present in all the organism suffering from the disease.
  • The isolated microorganism should be grown in pure culture.
  • The organism grown in the culture should be reintroduced in the susceptible but healthy host.
  • Finally the microorganism must be re-isolated from the experimental host an cultured to see whether it is identical to the original specific microorganism.

4 0
4 years ago
Read 2 more answers
Please help me on these
Otrada [13]
Wind Power and the heat from the sun
3 0
3 years ago
Read 2 more answers
Human health is unaffacted by enviromental limiting factors
SOVA2 [1]

Answer:

The given statement is False.

Human health is affected by the environment limiting factors. The limiting factors like food, water and some other resources are responsible for the human health and hygiene. The both the biotic and abiotic factors are responsible for the human health.

6 0
3 years ago
PLS HELP I DONT UNDERSTAND :( WILL GIVE BRAINLIEST + 25 POINTS!!! :D
Ludmilka [50]

Answer:

I think its the last one

7 0
3 years ago
How is homeostasis important to the survival of organisms?
anzhelika [568]
No the right answer is A. Homeostasis allows organisms to regulate their temperature because it makes sure the organisms cells do not burst or shrink. This allows the organism to survive.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Which of these would be true concerning mitochondria and nerve cells?
    7·1 answer
  • Which type of selection on a polygenic trait increases variation in the trait
    8·1 answer
  • How many chromosomes do both reproductive cells (gametes) *
    9·1 answer
  • What is a dichotomois keys
    14·1 answer
  • Why are vestigial structures are considered examples of<br>homologous structures?​
    6·1 answer
  • Exocytosis is a type of cellular transport that allows materials to move across the plasma membrane of a cell. Which of the stat
    9·2 answers
  • What type ofreproduction produces fungi that are different from either parent
    10·1 answer
  • Genetic Variation:Question 8
    14·1 answer
  • What is it acts need to do
    5·2 answers
  • The equilibrium number of doctor visits in this economy is500 visits per year, while the equilibrium price is per visit.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!