Leeches are famous as blood-suckers. The species that feed on blood have special chemicals in their saliva that prevents blood-clotting. Many blood-feeding leeches attack only fish, a few attack any vertebrate (including people), and a few are specialists on another group of animals, like turtles or waterbirds. There are also lots of leech species that don't suck blood. They are predators, eating worms, snails, aquatic insects, and other invertebrates.
The Minimum: 2 Months or 100 Total Hours. Studying for the LSAT should really take at least two months (or about 100 total hours of studying). Any less than that, and you probably wonât get the practice youâll need to get through the concepts tested.
Once you've made the decision to sit for the upcoming CFA exam, you need to develop a course of action. Here are some tips: Start Early. The CFA Institute estimates that at least 250 hours of independent study is necessary to pass each exam.In other words, a candidate starting six months before exam day should plan to spend no less than 10 hours a week studying.ere are some tips: Start Early. The CFA Institute estimates that at least 250 hours of independent study is necessary to pass each exam. In other words, a candidate starting six months before exam day should plan to spend no less than 10 hours a week studying.