When alzheimer disease appears in middle age rather than old age; it progresses more rapidly. Alzheimer's disease that results from the brain cell death. It is a neurodegenerative disease; such that there is progressive brain cell death that happens over a period of time. The brain tissue gets fewer and fewer nerve cells and connections.
I think some similarities and differences between the linnaean system of classification and cladistics is that they both rely on characteristics to classify organisms but cladistics are more precise. In Linnean taxonomy, species are grouped according to their appearances, while in cladistics, they are grouped according to the relative closeness of their gentic structure Cladistics is a system for hypothesizing an evolutionary tree and timeline, based on the characteristics shared between different organisms. However, there are some limitations of Linnaean Classification system is that it is based on appearance, DNA classifies more specifically, some may be related genetically but not physically.
Answer:
A symbiotic relationship is the one where the interaction of different types of species takes place. The two species remain in close proximity. The relationship can be either harmful, or beneficial for both of the species. Commensalism, parasitism and mutualism are the examples of the symbiotic relationship. In commensalism, the two species lives in close association and one species receives the benefit and the other receives no harm and benefit. In parasitism, the two species lives in close association, in this one species receives the benefit and cause harm to the other species. In mutualism, the two species lives in close association, in this both species receives the benefit of association.
Explanation:
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Which organelles are labeled D.?
Answer - B. lysosomes
Lysosome - "an organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane."
For gradualism changes in species is slow an gradual, occurring in small period changes in the gene pool, whereas for punctuated equilibrium, evolution occurs in spurts of relatively rapid change with long periods of non- change.