Explanation:
In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. Twenty-two of these pairs, called autosomes, look the same in both males and females. The 23rd pair, the sex chromosomes, differ between males and females.
Probability is the likelihood of something happening or being the case.
Answer:
Without bats, say goodbye to bananas, avocados and mangoes. Over 300 species of fruit depend on bats for pollination. Bats help spread seeds for nuts, figs and cacao -- the main ingredient in chocolate. Without bats, we also wouldn’t have plants like agave or the iconic saguaro cactus.
Explanation:
The short answer is: The scientist means that a dose of 20 mg per kilogram is enough to kill one half or fity percent of the animals used in the test. LD stands for leathal doseage. The 50 means 50 percent. Subsequently a dose of 20 mg per killogram has a lethal dose that will kill 50% of the test subjects.
