9. Fungi & Porifera Flashcards
1
Q
Organismal Complexity
A
- Protoplasmic
- Cellular
- Cell-tissue
- Tissue-organ
- Organ-system
2
Q
Protoplasmic
A
Unicellular
3
Q
Cellular
A
Colonial
- Aggregation of undifferentiated cells
- Choanoflagellates
Multicellular
- Aggregation of cells that are functionally different
- Sponges
4
Q
Cell-tissue
A
- Cells aggregate into patterns or layers
- Tissue - A group of cells organized to perform a common function
- True tissue secretes extracellular matrix in form of a basement membrane on which cells sit
- Cnidarians, Sponges
5
Q
Tissue-organ
A
- Organs contain more than one type of tissue
- More specialized function
- Platyhelminthes
6
Q
Organ-system
A
- Organs work together in a system
- Other eukaryotes
7
Q
Fungi
A
- Yeasts
- Rusts & Smuts
- Mould & Mildew
- Mushrooms
8
Q
Fungi
A
- Unicellular & Multicellular
- Originally classified as plants
- Cell walls made of chitin
9
Q
Nutrition in Fungi
A
- Extracellular digestion
- Release digestive enzymes into the environment and then absorb nutrition through cell walls
10
Q
Porifera
A
- No organs or true tissues
- No nervous system or sense organs
- Adults sessile and attached
- Limited body movement
- High totipotency
- All aquatic - mostly marine
- Radial symmetry or no symmetry
11
Q
Basic structure of sponges
A
- Many tiny ostia for incoming water
- One to several large oscula
12
Q
Ostia (sing. ostium)
A
Pores for incoming water
- Combines into oscula
13
Q
Oscula (sing. osculum)
A
Water outlet
- joint ostia
14
Q
Three basic types of sponge
A
- Asconoid
- Syconoid
- Leuconoid
15
Q
Asconoid Sponges
A
Flagellated Spongocoel
- Water enters through ostia into spongocoel
- Spongocoel is lined with choanocytes
- Water is pulled out of a single large osculum
