D. parasitism
The flea is gaining nutirents but since the dog is being harmed the flea is a parasites
Answer:
The correct answer is e. <em>Postzygotic barrier.</em>
Explanation:
Different species can not mate and produce viable, healthy and fertile descendence, due to certain mechanisms of <u>reproductive isolation</u>.
These mechanisms involve different kinds of barriers that make it difficult for two different species to produce viable and fertile progeny.
One of these is the <u>postzygotic barrier</u>, which avoids the hybrid zygote to develope to adultness. In these situations, there is a mix of chromosomes that can not happen to meet or that they lack information.
There are cases in which the embryo dies, but some times the individual can reach some more advanced develope stages. If this is the case, in general, they can not survive because the organism is unhealthy. And if they reach adultness in good sate they can not leave descendence, as they are sterile.
Oh god, large question. My eyes hurt... Mitosis is the formation of 2 identical daughter cells (cell division). Mitosis have 5 phrases: interphase, prometaphase, prophase, metaphase, anaphase, telophase and cytokinesis. The chromosomes are duplicated during the cell life just before mitosis since mitosis states that it is the splitting of the cells so duplicating the chromosomes isn't actually mitosis but it is still important to mitosis. Anyway, in interphase, the nucleolus starts to disappear, the microtubule starts to form and the chromosomes start to condense. In pro metaphase, some of the microtubule connect to the centromere, the cell membrane fully disappear and the chromosomes finishes condensing. In metaphase, the chromosomes are pulled to the center of the cell via by the contraction of the spindles and 2 spindles are connected to each of the kinetochores. In anaphase, the chromatids are separated via by the spindles. In Telophase, the nuclear membrane reappears, the chromosomes un-condenses and the micro tubal breaks down. In Cytokinesis, the cell membrane in one cell breaks apart from the other cell forming 2 daughter cells or in plant cells, another cell wall is formed. (this process can differ fro each different organism)
- Silk moths produce, well, silk (and collagen). Collagen is used for many medical-related purposes, making it very important to have! Currently, most collagen comes from cows, which have a history of causing allergic reactions in patients, while the collagen from silk moths is patient-friendly.
- Silk is also considered one of our most valuable fibers.
Hope this helps!
-Moiselle
<em />
<em>Source:</em>
<em>“Silkworms Spin Medicinal Gold.” GNN - Genome News Network, http://www.genomenewsnetwork.org/articles/01_03/silkworm.shtml#:~:text=In%20their%20cocoons%2C%20the%20insects,Female%20silkworm%20moth%20depositing%20eggs. </em>
The two groups of squirrels are not the same species.
The term species implies towards the organisms, which possess the tendency to breed with each other. In the given case, the two groups of squirrels got separated due to geographical isolation, as the result both the groups were inhibited to have mated with each other. As a result, the two different species of squirrels got originated due to the phenomenon.
