Chapter 4 Flashcards
1
Q
The first eukaryotic cells appeared
A
2 – 3 billion years ago
2
Q
Bacteria, archaea, and eukarya all evolved from the
A
last common ancestor.
3
Q
First primitive eukaryotes were likely
A
single-celled and independent.
4
Q
Over time cells _____, forming_____
A
aggregated, colonies
5
Q
Cells within colonies became ______
A
specialized to perform a specific function.
6
Q
Complex multicellular organisms evolved as individual cells
A
lost the ability to survive separately from the intact colony.
7
Q
Which EUKARYOTIC organism is always unicellular?
A
Protozoa
8
Q
Which EUKARYOTIC organism may be unicellular or multicellular?
A
Fungi
Algae
9
Q
Which EUKARYOTIC organism is always multicellular?
A
Helminths (have unicellular egg or larval forms)
