Cell Theory

Question 1

Cell Theory

Answer 1

1. Cell/s or cell products make up all living things
2. Cells are the smallest unit of life
3. Cells only come from pre-existing cells

Question 2

When and Who invented first compound microscope

Answer 2

Zacharias Janssen in 1590

Question 3

When and who and how were named cells

Answer 3

Robert Hooke in 1665 because he looked at a cork plant under a compound microscope and they looked like the rooms monks lived in

Question 4

When and which scientists created statements #1 and 2 of cell theory

Answer 4

Matthias Schleiden and Theodor Schwann “ in 1838-39

Question 5

When was and who invented statement #3 of cell theory

Answer 5

Rudolph Virchow in 1855

Question 6

What caveats cell theory statement #2

Answer 6

Straited muscle fibers, Aseptate fungal hyphae, and Giant Algae

Question 7

How does Striated muscle fibers caveat cell theory

Answer 7

Muscle cells fuse to form fibers that may be very long (>300mm), which means they will have multiple nuclei in one, continuous plasma membrane, which challenges the idea that cells always function as autonomous units

Question 8

How does Aseptate Fungal Hyphae caveat cell theory

Answer 8

• Fungi may have filamentous structures called hyphae, which are separated into cells by internal walls called septa
• Some fungi are not partitioned by septa, and hence have a continuous cytoplasm along the length of the hyphae which challenges the idea that living structures are composed of discrete cells

Question 9

How does Giant Algae caveat cell theory

Answer 9

• Certain species of unicellular algae may grow to very large sizes (e.g. Acetabularia may exceed 7 cm in length)
  Ergo, challenges the idea that larger organisms are always made of many microscopic cells