Answer:
The Geographic barrier would have led to speciation in the finches which started from the founder effect where the finches were brought to other areas of the Galapagos. They were separated geographically so they could not mate with each other. Over time, evolution occurs through natural selection and genetic drift. This leads to the population being so different so they have reproductive barriers and can no longer interbreed. They become different species.
Explanation:
Hope this helps you understand better.
Answer:
In taxonomy, binomial nomenclature ("two-term naming system"), also called binominal nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages. Such a name is called a binomial name (which may be shortened to just "binomial"), a binomen, binominal name or a scientific name; more informally it is also called a Latin name.
Answer:
The correct answer is option c. "frameshift mutations".
Explanation:
The reading frame of a gene is based on base-pair triplets, starting from the start codon until the ribosome encounters with the end codon. Base-pair additions and deletions are collectively referred to as frameshift mutations because they alter the reading frame of the gene. Base-pair additions and deletions break down the original sequence of the gene triplets, which alters the open reading frame and usually results in the production of non active proteins.
Coniferous trees dominate Boreal forests rather than tundra because of the lack of permanently frozen soil.
a lack of permanently frozen soil.
<u>Explanation:</u>
Boreal forests are characterized by a cold but not so cold weather. This means that it is too cold for the growth of deciduous trees. When it comes to the growth of tundra, the weather isn’t cold enough for the growth of tundra.
Tundra requires permafrost which is a permanently frozen layer of ground . The Boreal forests lack permafrost and thus isn’t suitable for the growth of tundra vegetation.
Answer:
The symptoms that a person with low testosterone would exhibit: fatigue, irritability, low sex drive, low strength, erectile dysfunction, hair loss, amongst others.
Explanation:
When the body is not producing enough testosterone, that is, low levels of testosterone -a very important sex hormone- it leads to a condition called male hypogonadism.
Depending on the age of the person, the male exhibits different symptoms. The most common ones are:
- Fatigue
- Irritability; mood changes; depressive symptoms
- Low sex drive
- Erectile dysfunction
- A reduction in the strength of the body
- Hair loss
This condition could be the result of different factors, such as <u>aging, chemotherapy, increased alcohol levels, radiation</u>, and diseases or syndromes such as <u>HIV, Kallman syndrome, hypothyroidism</u>.
