The bones found include a right humerus, which is robust and have heavy muscle markings on it. Another bone brought is a left humerus, which is gracile. These two humerus belong to the two different person, with the right humerus possibly belonging to a full grown male. Besides these humerus, a large left os coxa, or hip bone is also brought along with a gracile right femur whose head fits perfectly into the acetabulum of the os coxa. This indicates that the right femur and the os coxa belong to the same person. Also, the physical attributes of the left humerus also matches to the right femur, and os coxa. So, these three bones might belong to the same person. However, the robust right humerus belongs to the different person. Therefore, these four bones belongs to two different person.
Answer:
Post reproductive isolation → Hybrid sterility
Explanation:
The biological concept of species states that individuals of a species can not mate and reproduce with individuals of another species. But if they get to reproduce, the progeny will not be viable or fertile. There will not be any reproductive success.
There are different reproductive isolation mechanisms, which are barriers that inhibit or interrupt the genetic flow between different species.
Reproductive barriers are isolation mechanisms that prevent mating between two or more species. The prezygotic mechanism avoids fertilization between individuals of different species, while the postzygotic mechanism impedes the zygote to develop and reach the adult stage.
Postzygotic mechanisms or barriers include
- Hybrid inviability,
- Hybrid sterility,
- Hybrid decreased viability or fertility,
- Cytoplasmic interactions.
In the exposed example, it seems that the mountains separating the frogs´ populations made a place for the development of postzygotic barriers, specifically hybrid sterility. Frogs from one population get to mate and produce offspring with the frogs of the other population, but their progeny is sterile.
To obtain oxygen.............
A wolf is a tertiary consumer.
When the word Storms is used in relation to climatic
controls, we are not talking about tornadoes, hurricanes and the
like. Rather this control deals with the presence of moisture in
the atmosphere, the various means by which moisture is removed
from the atmosphere and the forms the moisture takes.
Meteorologists are very interested in the amount of moisture in
the air not only because the presence of water vapor is an
indicator of the potential for precipitation, but the energy
released as water vapor changes states provides the energy for
storms.
Moisture, or humidity, is a general term we will use to
describe the amount of water vapor in the air. There are a number
of ways to express the amount of humidity in the air -- the most
common being absolute humidity, relative humidity and mixing
ratio. We will take up each of these shortly.