|
|
Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Did you know?
Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.
Did you know?
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Did you know?
Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
![A mother dies, a father loses his leg—such calamities shattered poor urban families. Orphaned street](https://biology-forums.com/gallery/47/medium_6_24_08_15_12_36_55_224282222.jpeg)
![To use a battery charger, make sure the charger is connected to the battery before plugging in the ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_5_27_27_297722363.png)