Adaptations To Aquatic Environments Flashcards
Uptake of gases from water is limited by
Diffusion
Temperature limit is occurrence of aquatic ____
Life
Adaptations
Inherited traits of organisms that enhance their survival and reproduction in a particular environment
Adaptation
The result of natural secretion
Increased mean fitness of a generation relative to its progenitor generation as a result of having phenotypes that confer them with enhanced survival and reproduction
Waters prosperities that are favourable to life
-abundant
-immense capacity to dissolve inorganic compounds
-properties: thermal, density, and viscosity
Melting and boiling point of water
(Waters thermal properties)
0°c
100°c
Dissolved salts or other compounds and their effect on melting and boiling points
Lower melting point
Increase boiling point
(If you had more salt in cells, you’d freeze slower)
Specific heat
(Waters thermal properties)
Energy to heat 1g of a substance by 1°c
Water takes 1 cal of heat to increase 1 kg of water by 1°c
Absorbs much heat without changing temperature
SH of air is 0.0002 cal at 27°c
Latent heat of vaporization
(Waters thermal properties)
Energy needed to change 1 kg of water to gas
Latent heat of fusion
(Waters thermal properties)
Energy removed from 1 kg liquid water to convert it to ice
Ice is ____ dense than water
Less
Floats
Highest density of water
4°c
In which seasons does water mix
Spring and fall
When the temperatures are steady throughout depth
The _____ of organisms relative to water determines whether they _____
Density
Float
What helps organisms float
Lipids (fats, oils)
-oil droplets in microscopic algae
Gas in vesicles of different sizes
-swim bladder in some fish
Viscosity
Resistance of fluid to deformation in shear causes resistance for objects moving through it.
Thickness of a fluid that causes objects to encounter resistance as they move through it
Greater viscosity in ____ water
Cold
What slows down sinking in aquatic organisms
Long, feathery appendages
Many substances dissolve in water and therefore contains many elements needed by organisms like….
H, C, O, N, P, S, K, Ca, Mg, Fe, Si, Mo
What in nature contains silicon
Diatom cells
Grasses
Makes it hard to chew
What dissolved inorganic nutrient does chlorophyll contain
Magnesium
Salinity in lakes vs oceans
0.1-0.2%
3.4%-evaporation takes water but not salt
Normal range of pH for lakes, streams and wetlands
5-9
Acid rain contains what
SO2, NO2
Sulfur dioxide
Nitrogen dioxide
The environmental protection act has reduced SO2 deposition by _____
84%