Which of the following is a biologist?
doctor
farmer
geneticis...
![subject](/tpl/images/cats/biologiya.png)
![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)
Biology, 22.06.2019 04:30
Why are scientists concerned about the depletion of the ozone levels in the stratosphere?
Answers: 2
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 13:00
Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?
Answers: 1
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 16:00
Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems
Answers: 1
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 22:30
What is a food web? a. the structure used to trap food b. a set of complex carbohydrates c. a group of interconnected food chains d. the pattern of food nutrition
Answers: 2
You know the right answer?
Questions
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 14:02
![question](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 14:02
![question](/tpl/images/cats/istoriya.png)
History, 05.05.2020 14:02
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 14:02
![question](/tpl/images/cats/es.png)
Spanish, 05.05.2020 14:02
![question](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 14:02
![question](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 14:02
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 14:02
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/en.png)
English, 05.05.2020 14:02
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 14:02
![question](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 14:02
![question](/tpl/images/cats/mat.png)
Mathematics, 05.05.2020 14:02