![subject](/tpl/images/cats/biologiya.png)
Biology, 25.01.2020 07:31 ineedhelp2285
Many songbirds breed in north america in the spring and summer, and then migrate to central and south america in the fall. they spend the winter in these warmer areas where they feed and prepare for the spring migration north and another breeding season. two hypothetical species of sparrow. a and b. overwinter together in mixed flocks in costa rica. in spring. species a goes to the east coast of north america, and species b goes to the west coast. what can you say about the isolating mechanisms of these two species? a) they must have strong postzygotic isolating mechanisms to spend winter in such close proximity b) they must have strong prezygotic isolating mechanisms to spend winter in such close proximity. c) these two species mate in different climates. d) reinforcement must be occurring when they winter together.
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Other questions on the subject: Biology
![image](/tpl/images/cats/biologiya.png)
![image](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 09:00, xelynncaldera
In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.
Answers: 1
![image](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 12:00, calebabaltimore
Why has two different alleles for the same trait?
Answers: 1
You know the right answer?
Many songbirds breed in north america in the spring and summer, and then migrate to central and sout...
Questions in other subjects:
![Konu](/tpl/images/cats/geografiya.png)
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 02.08.2019 00:00
![Konu](/tpl/images/cats/mat.png)
Mathematics, 02.08.2019 00:00
![Konu](/tpl/images/cats/himiya.png)
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/mat.png)
Mathematics, 02.08.2019 00:00
![Konu](/tpl/images/cats/health.png)
Health, 02.08.2019 00:00
![Konu](/tpl/images/cats/fizika.png)
Physics, 02.08.2019 00:00
![Konu](/tpl/images/cats/mkx.png)
Arts, 02.08.2019 00:00