ecosystems qp2

Question 1

how is animal protein and plant protein converted to hummus

Answer 1

-death/ leaf loss
-decomposition/ decay
-excretion/ urination
-egestion

Question 2

what type of bacteria are nitrosomas and nitrobacter

Answer 2

they are nitrifying bacteria

Question 3

why is the continued existence of rare breeds of farm animals desirable

Answer 3

• genetic resource/ gene bank/ have different alleles
  -for genetic engineering/ artificial selection
  -example of useful trait
  -maintain genetic diversity/ biodiversity

Question 4

why does a tropical rainforest have a high npp

Answer 4

-higher temp
-more sunglight
-photosynthesis faster
-more formation of organic molecules/ biomass
-more storage of organic molecules/biomass

Question 5

how can the energy content of grass be measured

Answer 5

calorimeter
known mass of organic material burnt in oxygen
temperature rise of water measured

Question 6

compare pioneer community to climax community

Answer 6

-pioneers arrive before climax/ earlier
-pioneer communities subject to greater change
-pioneer community has lower biodiversity
-pioneer community is less stable
-pioneer community has a lower biomass

Question 7

why varieties are different from each other biochemically

Answer 7

-different genes
-repressor proteins
-enzymes
-protein folding/ tertiary structure
-growth regulators/ hormones