Ecology and evolution - 1 - 20

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L U Y H I Q H B L M L P O J Q T X B I N O
S Q A S J H I V A H L V U J L S A C X K L
W F K L N C S G R R D X P V J H F N U U S
R P O I X D H D U P G M U F R P N B G T M
E P O P U L A T I O N E C O L O G Y S K H
M N C T A X G O W F Q V N J I C A Y G R M
K H M L E C R F G T C P E T N P B M V N I
Y T P A C S G G G C X U U F X W N X B L D
L Q D P T S Y R C B E L M R B B O S L U Y
Y K H N F G W L Y W O X I F S R J U U B A
H I Y A D I S H N V M L N C F Q B E C J W
P F D X L Q W M E R Y H R M E P S H M I A
O S X A O W J O F N A R H W E L O J Y M R
N C E X I J R A F A F B W F W D F B A W Q
O R O P G C M G K O S G P Y H C S C M S A
M C E S I G V T V S D R H J H E G R N M B
R X J M U S L C S M T P I R J F L U V B L
X O M X X A R N C T I P J L E G B X B W B
X O N A T U R A L S E L E C T I O N H A E
S B V R A R O U G D G M F V C A V K D L Y
U C R D Y C L S Q B W Y G Q T T W A E T T

Clues

  • At which level is it presumed we have the least scientific understanding? (10, 7)
  • Change in genetic composition between generations (14)
  • In cladistic taxonomy, organisms are classified on the basis of (9)
  • Snails with brown shells are more common in woodlands where the ground surface is darker; against this background snails with yellow shells are very visible and are more likely to be eaten by predatory birds. This is an example of: (7, 9)

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