There are choices for this question, namely:
<span>chemical name
generic name
brand name
research name
</span>
The correct answer is "brand name". The brand name is the name of the drug that is tied to the specific manufacturer. The generic name of the drug is the approved name of the drug which corresponds to its drug class and specific mode of actions. The chemical name, as the name suggests, comprise of the detailed chemical makeup of the drug.
Eyeglasses<span> (also called spectacles) are</span><span> the most common form of </span>eye wear.<span> They are used to correct or improve many types of vision problems. They are a frame that holds two pieces of glass or plastic, which have been ground into lenses to correct refractive errors.</span>
Slow reproduction process is a disadvantage of sexual reproduction. So option A is correct.
Sexual reproduction is much slower than asexual form of reproduction and the meiosis process is much longer and complex than mitosis. The process of sexual reproduction depends on the fertilization and zygote formation which are time consuming processes. This longer duration of reproduction process leads to lesser number of individuals in the population. In this case there may be instances of producing only one organism per year and if by chance no offspring is produced for certain number of years can lead to extinction of the species.