![subject](/tpl/images/cats/biologiya.png)
Biology, 21.07.2019 04:00 cristykianpour
What substances move freely through the shell of the egg?
![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 11:30
According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes
Answers: 2
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 12:00
Aprocedure done under controlled conditions to test a hypothesis is an inquiry.
Answers: 1
![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 14:30
All annelids and arthropods have a blank body plan . unlike annelids, arthropods also have blank . the circulatory system of annelids is blank , while circulatory system of arthropods is blank .
Answers: 3
You know the right answer?
What substances move freely through the shell of the egg?...
Questions
![question](/tpl/images/cats/en.png)
English, 08.09.2021 21:40
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/fizika.png)
Physics, 08.09.2021 21:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 08.09.2021 21:40
![question](/tpl/images/cats/en.png)
English, 08.09.2021 21:40
![question](/tpl/images/cats/es.png)
Spanish, 08.09.2021 21:40
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
English, 08.09.2021 21:40
![question](/tpl/images/cats/ekonomika.png)
Business, 08.09.2021 21:40
![question](/tpl/images/cats/mat.png)
Mathematics, 08.09.2021 21:40
![question](/tpl/images/cats/mat.png)
Mathematics, 08.09.2021 21:40
![question](/tpl/images/cats/ekonomika.png)
Business, 08.09.2021 21:40
![question](/tpl/images/cats/mat.png)
Mathematics, 08.09.2021 21:40
![question](/tpl/images/cats/mat.png)
Mathematics, 08.09.2021 21:40
![question](/tpl/images/cats/ekonomika.png)