The answer is reproductive isolation. Reproductive isolation ensures members of different species do not produce offspring. In this case, geographical separation is ensuring that individuals from the two different populations are not able to mate with each other. Eventually, through different selective pressures, the two populations will diverge sufficiently in genotype to become distinctly different.
A dichotomous key is defined as a biological tool for identifying unknown organisms to a particular taxonomic level. It is constructed with many levels and series of couplets.
So, by observing the given dichotomous key, it is concluded that the correct answer is Option A- Organism X and Z have at least one observable trait in common in this dichotomous key.
Answer:
The statement that best describes the vascular tissue in seed plants is that xylem carries water and nutrients from the roots to the rest of the plant.
Explanation:
Xylem corresponds to the tissue of the vascular plants that is responsible for the transport and distribution of liquids necessary for their development.
The main function of xylem is to<u> carry water, mineral salts and other nutrients -in the form of raw sap- from the root to the whole plant</u>, forming a network similar to the circulatory system of higher animals.
<span> Very inefficient. Almost 90% of all energy is lost between trophic levels. That is why larger animals need to eat more, because less energy is being consumed.
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Conception is necessary for the continuation of species...for reproduction.
