- Grade 11 and 12 Mathematics (Moderator: geoffrey)
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- Grade 11 and 12 Mathematics (Moderator: geoffrey)
Did you know?
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Did you know?
Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
Did you know?
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Did you know?
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Did you know?
Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
![A blood smear. The smear reveals representative cells from each formed element group: red blood cell](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_18_43_100341996.jpeg)
![Martin Van Buren, sitting uncomfortably for this engraving, would eventually ascend to the presidenc](https://biology-forums.com/gallery/47/medium_374628_16_08_15_9_59_54_222701478.jpeg)