<span>Endoplasmic reticulum (ER) is a network of interconnected sacs (cisternae). Depending on the presence of ribosomes on the surface of their membrane, ER can be rough or smooth. Smooth ER does not have ribosomes on the surface of its membrane. Smooth ER plays a part in lipid production and metabolism, as well as in the production of steroid hormones. It is also involved in detoxification of organic chemicals, products of natural metabolism, etc.</span>
3- spores that’s the answer
Multiple sclerosis (MS) is common known demyelinating disease of the central nervous system. In this disease, your immune system attacks the myelin sheath or the cells that produce and maintain myelin sheath.
These attack can cause inflammation and injury to the nerve sheath and ultimately to the nerve fibers that it surrounds. In Multiple sclerosis , the affected part is immune system that attacks the protective sheath (myelin) that coats over the nerve fibers and causes communication problems between your brain and the rest of your body. Gradually , the disease can cause permanent damage or deterioration of the nerves.
To learn more about Multiple sclerosis (MS) , here
brainly.com/question/9516512
#SPJ4
For the answer to the question above,<span> a proposed explanation in evolutionary biology stating that species are generally stable over long periods of time is called "</span><span>punctuated equilibrium"</span> and occasionally there are rapid changes that affect some species which can quickly result in a new species.
The answer is <span>"</span><span>punctuated equilibrium"</span>
1. Convergent evolution - flying squirrel and flying phalanger. Convergent evolution is the process at which non monophyletic organisms, evolve similar traits. These traits are a result of adapting to similar environments but these organism still evolve them in different, independant ways.
2.Coevolution - bees and flowers. Coevolution is the process that takes place among organisms that take part in a mutual interaction during which both the organisms benefit one from another. For example: many flowers with short nectar tubes can die out, as well as well as the moths with short tongues until they meet each other and make pollination.
3. Divergent evolution - cichlid fishes. This type of evolution can be characterized as the accumulation of differences between groups that can form new species in a result of diffusion of the same ones from different environments. This process tends to block the gene flow among the distinct populations which also allows fixation of traits through genetic drift.