water

Question 1

how do hydrogen bonds form between molecules

Answer 1

water is polar , oxygen is more electronegative than hydrogen so it attracts electron density in covalent bonds more strongly.forming oxygen-slightly negative
hydrogen-slightly positive there are intermolecular forces of attraction between the molecules

Question 2

state the 7 biological functions of water

Answer 2

high specific latent heat of vaporisation
high specific heat capacity
cohesive properties
incompressible
metabolite
reaches max density at 4 degrees
high surface tension

Question 3

why is water being incompressible good for organisms

Answer 3

provides turgidity to cells
provides hydrostatic skeleton for some small animals eg earthworms

Question 4

why is it important ice floats on water for organisms

Answer 4

insulates water in arctic climates so organisms can survive water acts as a habitat

Question 5

why is high surface tension important for organisms

Answer 5

slows water loss due to transpiration in plants

Question 6

why is water an important solvent for organisms

Answer 6

transports charged particles involved in intra and extracellular reactions

Question 7

why is high s.h.c and high l.h.v important for organisms

Answer 7

acts as temp buffer which enables endotherms to resist fluctuations maintaining enzyme activity
cooling effects when water evaporates from skin surface as sweat