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
taurus [48]
3 years ago
8

Mosquitoes in tropical regions can carry and transmit the malaria parasite to humans. The mosquitoes used to be killed in these

regions by spraying them with the insecticide DDT. The mosquitoes that were earlier sensitive to DDT are now not killed by DDT and grow and multiply even in the presence of DDT. How can you explain this phenomenon?
Select one of the options below as your answer:


A.
All of the mosquitoes must have undergone a mutation for DDT resistance and produced similar kind of resistant offspring, which evolved into a DDT resistant population.


B.
Some of the
mosquitoes must have undergone a mutation for DDT resistance and produced similar kind of resistant offspring, which would have been selected by nature.


C.
All of the mosquitoes must have slowly increased their tolerance level to DDT and ultimately would have become completely resistant to DDT.
Health
2 answers:
ASHA 777 [7]3 years ago
4 0

I think it would be c.


I hope this helps good luck! :)

DIA [1.3K]3 years ago
3 0
Right answer is iption b.hopefully it helps.
You might be interested in
I’m sure I know this but honestly I forgot :( I know it’s not C
Nana76 [90]

Answer:

B. To transport nutrients to the body

Explanation:

the blood vessels transport nutrients to the tissues of your body!

3 0
3 years ago
Most migration abilities are learned responses.<br><br> True<br> False
elena-s [515]

yeah the answer is true

3 0
3 years ago
Jamie is a 16-year-old tennis player who has recently embarked on a vegan diet. Because of her food choices (mostly fruit smooth
Elena-2011 [213]

Answer: Low protein amounts

Explanation:

The human skin is made up of fats, water and protein with the most important protein being Collagen. Collagen is necessary for the body to heal its skin and nails and it uses it to reconstitute the damaged skin cells.

Meat provides an abundant source for proteins like collagen and because vegetarians like Jamie do not eat meat, they are denied this abundant source of protein such that they will be unable to heal their skin as effectively and as fast.

7 0
2 years ago
If your date is verbally abusive to you, it's probably because you did something wrong.
Mashutka [201]
B. False, when someone is abusive it is never the victims fault
6 0
3 years ago
Read 2 more answers
_______ typify the HighScope curriculum program.
NemiM [27]

I think the answer is d. Hope this helps

5 0
2 years ago
Other questions:
  • Which trait is associated with a high level of health
    11·1 answer
  • Men have ______ times more testosterone than women.
    5·1 answer
  • Which defense mechanism occurs when one refuses to face a feeling?
    9·2 answers
  • Which of these health risks may be caused by iron deficiency?
    8·2 answers
  • The Early Educator Certification (EEC) does what for professionals in the field of early childhood?
    7·1 answer
  • If you were in charge of a ward in a mental hospital, how would you run it? Give 2 or 3 rules that ​you think would be the most
    7·2 answers
  • why do healthcare professionals use body plans and anatomical directions terms when communicating information about patients?​
    11·1 answer
  • Answer quick plzzz. If you give me any trash I'll report you quicker than the speed of light.
    10·2 answers
  • The inguinal region is [ ]
    11·1 answer
  • As part of a primary cancer prevention program, an oncology nurse answers questions from the public at a health fair. when someo
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!