April 16, 2014

Homework Help: Biology

Posted by Anon on Wednesday, December 12, 2012 at 9:44pm.

1. Two species live in the same area but breed in different parts of their habitat. These species are
A) geographically isolated.
B) ecologically isolated.
C) artificially isolated.
D) likely to produce hybrids.

2. A large population of animals is split in two by a physical barrier. Over time, the genetic make up of the two resulting populations becomes more and more different, until each population becomes a separate species. This is an example of
A) sympatric speciation.
B) allopatric speciation.
C) genetic drift.
D) reproductive isolation.

3. A rainforest is a highly complex habitat, with organisms living at various levels in the trees, on the ground, and underground. Is it possible to consider two populations living in the same tree to be geographically isolated?
A) No, because if they are in the same tree, they are in the same geographic area.
B) No, because if they are in the same square acre, they cannot be considered to be geographically isolated.
C) Yes, because they can still undergo sympatric speciation.
D) Yes, because there are so many habitats in one tree that the populations may never interact.

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