![subject](/tpl/images/cats/biologiya.png)
Biology, 03.05.2021 20:00 robert7248
Why did most mosquitoes perish when DDT was sprayed the first time?
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Biology
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 13:10
Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.
Answers: 2
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 13:20
Where is the nictitating membrane found? a. between the eyelid and the eyeball b. between the retina and the optic nerve c. between the outer and middle ear d. in the organ of corti in the middle ear
Answers: 2
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 17:30
Adding more tributaries to a local river basin can have what effect?
Answers: 3
You know the right answer?
Why did most mosquitoes perish when DDT was sprayed the first time?...
Questions
![question](/tpl/images/cats/en.png)
English, 27.03.2020 21:06
![question](/tpl/images/cats/en.png)
English, 27.03.2020 21:06
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/ekonomika.png)
Business, 27.03.2020 21:06
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 27.03.2020 21:06
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 27.03.2020 21:06
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 27.03.2020 21:06
![question](/tpl/images/cats/es.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 27.03.2020 21:07
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 27.03.2020 21:09