|
|
Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.
The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.
![A second jetliner approaches the south tower of the World Trade Center on September 11, 2001. The no](https://biology-forums.com/gallery/47/medium_27_24_08_15_1_42_53_223991776.jpeg)
![Used antifreeze coolant should be kept separate and stored in a leakproof container until it can be ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_3_10_41_29512996.png)