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Why might a geographic barrier such as a large river cause the formation of a new species of small rodents but not a new species of birds?
Geographic barrier is the barrier which cease the movement of any organism through it. Now as rodents which are not able to cross the river stay apart and develop into different species whereas the as the birds are able to fly the can cross this barrier and can cross with the birds of other part which did not lead the formation of new species of birds.
Does dopamine cross the blood-brain barrier?
Yes, dopamine can cross the blood-brain barrier.
Which antibodies can cross placental barrier?
IgG is the only antibody small enough to cross he placenta.
Can humans catch throat virus from dogs?
Dogs cannot get most viruses carried by humans as these viruses cannot cross the species barrier. Deadly viruses like rabies can cross the barrier between species, but are more often transmitted from the dog to the human. A common misconception is that dogs can catch a cold or flu from their owners but this is untrue
A reproductive barrier that prevents species from mating is an example of?
a prezygotic barrier
How many species are threatened by the Great Barrier Reef?
The Great Barrier Reef poses no threat to any species. It is the species that already live within the waters of the Great Barrier Reef that are under threat from external sources.
Does netilmicin crosses blood brain barrier?
Netilmicin does not cross the blood-brain barrier.
What substances cannot cross the blood-brain barrier?
Large molecules, such as proteins and most drugs, cannot easily cross the blood-brain barrier.
How many species of fish live in the Great Barrier Reef?
According to the Great Barrier Reef Marine Park Authority, there are about 1625 species of fish that live in and around the Great Barrier Reef, not including the shark species. Of these, 1400 are coral reef species. In addition, there are over 3000 species of molluscs, 630 species of echinoderm such as starfish and sea urchins, 14 known species of sea snakes, 30 species of whales and dolphins, dugongs and 133 species of sharks and rays.
Does Valium cross the blood brain barrier?
Yes. Valium (diazepam) does indeed cross the blood brain barrier. It is one of the more lipophilic of the benzodiazepine medications.
How do you use a sentence with the word barrier?
We just have one more barrier to cross; then we can lay siege to the castle.
Why might a goegraphic barrier such as a large river cause the formation of a new species of small rodents but not a new species of birds?
It might also be instrumental in the evolution of a new species of bird. With birds, however, the impact of such a barrier will usually be much smaller, as birds can more easily cross such barriers and therefore maintain a high interbreeding frequency. The decline of interbreeding frequency is what causes subpopulations to diverge, sometimes culminating in speciation.
