Answer:
Speciation occurs at terminal population groups
Explanation:
A ring species represents a group of organism that has moved beyond a geographic barrier to produce a ring shaped distribution. This population is contiguous and there exists no barrier to gene flow anywhere in the ring except at the terminal populations.
Speciation is demonstrated in the terminal population has become sympatric and it does not interbreed even if they are connected by chain of intergrading or interbreeding populations
Answer:
because during the measurement of the fetus, the fetus shows 40% of its natural length
Explanation:
The total length of each fetus is multiplied by 2.5 to obtain the actual length because during the measurement of the fetus, the fetus shows 40% of its natural length
Answer:
Option B
Explanation:
Artificial selection is influencing of inheritance of any trait . in this limited options are given to allow a species to mate and produce offspring
In genetic code editing directly genes are edited.
Hence, option B is correct
Answer:
Ganymede has a very thin atmosphere and its average surface temperature is -171 degrees F. so it would obviously require an external suit for protection from the elements and to store, filter and convert oxygen to a form breathable by humans, as Ganymede has a largely oxygen composed atmosphere but not in the form or density humans need. For a size comparison, here is a picture of Earth, our moon and Ganymede all side by side. Ganymede is the medium sized of the three in the bottom left-hand corner.
It has a liquid-iron core which provides a small magnetosphere for protection from radiation but Jupiter’s magnetosphere substantially over powers it. The surface gravity is slightly more than a tenth of Earth’s, so I’d personally enjoy the lesser effort required to move my big bones around. As with most moons, Ganymede is tidally-locked, meaning that one side always faces Jupiter and one side always faces outward. This means a few things but most importantly to your question, it means that Jupiter’s gravity pulls hard enough, continuously on the same side to provide some geothermal activity. Those warm spots would provide opportunities for energy gathering and further scientific study.
Maybe the most important part of Ganymede’s potential habitability is that we believe it has a huge underground salt-water ocean which could be used in many ways to sustain a colony. The only obstacle is that much and/or all of the technology we are talking about that would be required, is not yet in existence.
After first exposure to an antigen, it can take about three weeks for antibodies to reach a detectable level. The body will react to disease by creating antibodies and testing their effectiveness against the unknown antigen.
Antibodies are the body's way of fighting off foreign threats. Also known as immunoglobulin, they detect and attack pathogenic bacteria and viruses. These antibodies detect a protein that is unique to the surface of the pathogen called the antigen.
At times, we can see an increase in antibodies for one disease, for example, <em>Lyme disease</em>, in the presence of <em><u>non-Lyme disease antigens.</u></em> This is often due to antigenic variation, which is a method used by pathogens to mask their respective antigens. There are also general use antibodies that will increase in reaction to any pathogen.
As with any illness, a patient who receives treatment sooner will fare better than those whose treatment is delayed. This is due to the fact that earlier treatment with antibiotics will allow the body to fight off the infection before the bacteria can reproduce further.
After the first immune response, antigen-specific antibodies will remain for some time to provide the body with "immunity" to the pathogen, while <u>general-purpose antibodies will return to a base value. </u>
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