Biology, 12.03.2020 06:14 bevanscory123
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.
Answers: 3
Biology, 22.06.2019 02:30
Drag each tile to the correct box. arrange the phases of mitosis in the correct order. 1 (condensation of chromosomes) 2 (separation of chromosomes) 3 (formation of spindle fibers) 4 (alignment of chromosomes in the center of the cell) 5 (pinching of the cell membrane)
Answers: 2
Biology, 22.06.2019 13:00
Facilitated diffusion move large molecules and/or polar molecules across the cell membrane. what does facilitated diffusion use to do this?
Answers: 3
Biology, 22.06.2019 17:30
Which of the following is not a technology that can be used to conserve resources? a. hydropower b. volcanic power c. natural gas d. geothermal select the best answer from the choices provided a b c d
Answers: 1
Many songbirds breed in North America in the spring and summer and then migrate to Central and South...
Mathematics, 02.10.2019 08:30
English, 02.10.2019 08:30
Mathematics, 02.10.2019 08:30
Mathematics, 02.10.2019 08:30
Mathematics, 02.10.2019 08:30
English, 02.10.2019 08:30
Spanish, 02.10.2019 08:30
History, 02.10.2019 08:30
Mathematics, 02.10.2019 08:30
Mathematics, 02.10.2019 08:30
Mathematics, 02.10.2019 08:30
Mathematics, 02.10.2019 08:30
Mathematics, 02.10.2019 08:30