This topic contains a solution. Click here to go to the answer
|
|
Did you know?
The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
Did you know?
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
Did you know?
The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.
Did you know?
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
![Alexander Fleming photographed in his lab where he observed the natural competition between a fungus](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_20_13_100452376.jpeg)
![A sidewheeler on the Mississippi. In 1856 Samuel Clemens became an apprentice to a steamboat pilot a](https://biology-forums.com/gallery/47/medium_376716_26_08_15_11_14_04_224371495.jpeg)