20 Questions
Why can't most animals breathe through their skin alone on land?
Larger size leads to a reduced surface area relative to volume for gas exchange
Why do leaves tend to be broad, flat, and thin?
To increase light absorption for photosynthesis
How do terrestrial animals restrict water loss while still obtaining oxygen?
By tucking their respiratory organs inside their bodies
What is the relationship between fungal mycorrhizae and plants?
Mycorrhizae help plants absorb water and minerals, while plants provide sugars to fungi
Why do fungi play a crucial role in nutrient acquisition for plants?
Fungi have a high surface area to absorb water and minerals efficiently
What is the primary reason animals cannot rely solely on their skin for gas exchange on land?
Insufficient surface area for gas exchange relative to body volume
What is a key difference between ingestive heterotrophs and absorptive heterotrophs?
Ingestive heterotrophs secrete digestive enzymes outside the organism for absorption, while absorptive heterotrophs have a digestive tract for digestion.
How do photoautotrophs differ from ingestive heterotrophs in terms of nutrient uptake?
Photoautotrophs acquire carbon dioxide and water for photosynthesis, while ingestive heterotrophs absorb digested food through plasma membranes.
Which statement accurately describes the gas exchange in terrestrial organisms compared to unicellular and simple multicellular organisms?
Unicellular and simple multicellular organisms have high surface area to volume ratio, making gas exchange easier than in terrestrial organisms.
What is the primary role of the roots in photoautotrophs?
Roots selectively absorb nutrients and water, aiding in photosynthesis.
How do absorptive heterotrophs acquire nutrients compared to photoautotrophs?
Absorptive heterotrophs ingest large food chunks into their digestive tracts, while photoautotrophs absorb dissolved minerals through their vascular tissue.
Why do fungal organisms typically live in moist places?
To prevent desiccation caused by the tradeoff between food intake and water loss.
What is the main difference between poikilotherms and homeotherms in terms of temperature control?
Homeotherms depend on external environmental temperature to determine internal temperature, while poikilotherms can use internal metabolism for heat regulation.
Which type of animal relies on external environmental temperature for thermoregulation?
Ectotherms
What are some structural adaptations used for thermoregulation by endotherms?
Insulation like blubber and fur
Which macromolecule is essential for growth and maintenance of life among the four mentioned?
Proteins
What is the main difference between endotherms and ectotherms in acquiring nutrients?
Endotherms absorb nutrients directly through their skin, while ectotherms secrete enzymes for digestion outside the body.
What distinguishes absorptive heterotrophs like prokaryotes and fungi in acquiring nutrients?
They first secrete enzymes on food items to digest them outside the organism.
'Amylase' is an example of an enzyme used for which purpose in nutrient acquisition?
Breaking down carbohydrates into monosaccharides
'SA/V ratio' plays a crucial role in which process relevant to nutrient uptake?
Transport of nutrients across cell membranes
Test your knowledge on how fungi uptake simple sugars, secrete enzymes for digestion, and absorb nutrients through their plasma membrane. Learn about the benefits of their filamentous structure in food absorption and gas exchange.
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