Chapter 2 (2.2) Flashcards
1
Q
Movement of Amoeba sp. (1) & Paramecium sp. (1)
A
Amoeba sp. - extending pseudopodium followed by flow of cytoplasm into it
Paramecium sp. - uses rhythmic cilia beats
2
Q
Nutrition of Amoeba sp. (4)
A
- move towards food by extending pseudopodium to trap food particles by phagocytosis
- food vacuole combines with lysosome and hydrolysed by lysozyme
- nutrients are absorbed into the cytoplasm
- undigested food is discharged when the amoeba moves
3
Q
Nutrition of Paramecium sp. (4)
A
- presence of cilium beats help transfer food particles along the oral groove into the gullet & cytostome
- food vacuole forms and pinches off
- the food vacuole circulated around the cell while being digested
- undigested food is discharged through the anus
4
Q
Growth of Amoeba sp. & Paramecium sp. (1)
A
- grow by synthesising new cytoplasm
5
Q
Responding to stimuli of Amoeba sp. and Paramecium sp. (1)
A
- responds to stimuli such as chemicals, bright light or touch by moving away
6
Q
Respiration of Amoeba sp. and Paramecium sp. (1)
A
- exchange of O2 and CO2 occurs through the plasma membrane by simple diffusion
7
Q
Excretion of Amoeba sp. and Paramecium sp. (4) [Osmoregulation}
A
- wastes (CO2 and ammonia) are removed by diffusion
- since they live in freshwater, water will diffuse by osmosis and fill the contractile vacuole
- when the vacuole expands to max size contraction occurs and water is excreted
- this process is known as osmoregulation
8
Q
Reproduction of Amoeba sp. (2)
A
- suitable conditions: reproduce via asexual reproduction- binary fission through mitosis
- unsuitable conditions (dry, cold, food shortage) : forms spores that will only germinate when the environment improves
9
Q
Reproduction of Paramecium sp. (2)
A
- suitable conditions: reproduce via asexual reproduction- binary fission through mitosis
- unsuitable conditions: reproduce via sexual reproduction- conjugation
