Environmental Condition 1:

There is no land or bodies of saltwater on the planet. The entire planet’s habitat is freshwater.

Which ONE of the following options describes a single-celled organism best adapted to this environmental condition, together with an accurate justification ?

Question

Environmental Condition 1: 
 
 There is no land or bodies of saltwater on the planet. The entire planet’s habitat is freshwater. 
 
 Which  ONE  of the following options describes a single-celled organism  best adapted  to this environmental condition, together with an  accurate justification ?

Answer

The organism has a thick cell wall to prevent water loss.

Answer

The organism utilises a buffer system to stabilise the pH level, resulting in the cytoplasm becoming more acidic.

Answer

The organism has a large number of mitochondria to enable the active transport of water into the cell.

Answer

The organism has a reduced number of mitochondria to increase the rate of the active transport of ions from the cytoplasm to the surrounding environment.

Answer

The organism uses passive diffusion to absorb nutrients.

Answer

The organism has specialised vacuoles to expel excess water.

Answer

The organism alters its metabolic pathways to reduce energy consumption.

Answer

The organism has a large oral groove to assist with increased water intake.

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Environmental Condition 1: There is no land or bodies of saltwater on the pl...

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