Biology 1 Notes

Topics: Cell, Eukaryote, Protein Pages: 3 (1035 words) Published: March 13, 2001
1. Living things can be either uni-cellular (one cell) or multi cellular. A bacteria is one type of unicellular. 2. About 8000 of the smallest bacteria could fit inside one of your red blood cells. 3. The longest cells are the thin nerve cells found in large animals and they can be more than a meter long. 4. The cell with the greatest volume is an unfertilized ostrich egg 5. A cell's shape is related to its function. For example, a long nerve cell is long and it carries messages from your spine to your toes. The contraction and relaxation of muscle tissue is responsible for the movement in animals.

1. In the 1600's people only knew about organisms they could see with the unaided eye. 2. A trio of Dutch eyeglass makers invented the microscope in the late 1500's. It consisted of a tube with lenses ground from rock crystal, and it magnified objects up to 9 times their actual size. 3. In 1665 the British scientist Robert Hooke published a set of drawings illustrating what he had observed with a microscope. 4. In the early 1670's Anton van Leeuwenhook, a Dutch fabric-store owner, began to grind lenses as a hobby. He used handheld microscopes to examine materials such as pond water and blood.

1. By the 1830's many biologists were using the microscope as their chief investigative tool 2. Mathias Schleiden was a botanist, a scientist that studies plants. He found that plant parts he examined were made out of cells. In 1838 Schleiden made the generalization that all plants are made of cells. 3. Theodor Schwann was studying and animals. His microscopic investigations of animal parts led him to generalize that all animals were made of cells. 4. In 1858, a German doctor named Rudolf Virchow disputed the idea of spontaneous generation. Virchow reasoned that new plant cells arise only from existing plant cells, and new plant animal cells arise only from existing animal cells....
Continue Reading

Please join StudyMode to read the full document

You May Also Find These Documents Helpful

  • Biology Essay
  • Biology Notes Essay
  • Essay on 7 2 Biology Notes
  • BIology grade 11 notes Essay
  • Biology Prelim Topic 1 notes Essay
  • As Biology Unit 1 Notes Essay
  • Biology Ch. 1 Notes Essay
  • As Biology Unit 1 Summary Essay

Become a StudyMode Member

Sign Up - It's Free