Cambridge ielts 1-15 series reading answers explained

=>ANSWER: FALSE
CAMBRIDGE IELTS 5 – TEST 4 – PASSAGE 2
FLAWED BEAUTY: THE PROBLEM WITH TOUGHENED GLASS 
THE EFFECT OF LIGHT ON PLANTS AND ANIMAL SPECIES 
QUESTIONS 27-33: TRUE/FALSE/NOT GIVEN 

---

53 
27
. THERE IS PLENTY OF SCIENTIFIC EVIDENCE TO SUPPORT 
PHOTOPERIODISM 
Keywords
: plenty, scientific evidence, photoperiodism 
In paragraph 2, the writer says: “The seasonal impact of day length on physiological responses is 
called photoperiodism, the amount of experimental evidence for this phenomenon is considerable.” 
scientific evidence = experimental evidence 
plenty = considerable 
=>ANSWER: TRUE
28
) SOME TYPES OF BIRD CAN BE ENCOURAGED TO BREED OUT OF 
SEASON 
Keywords
: bird, encouraged, breed out of season 
In paragraph 2, the writer says: “For example, some species of birds‟ breeding can be induced even in 
midwinter simply by increasing day length artificially (Wolfson 1964)”. 
+ types = species 
+ out of season = even in midwinter 
=>ANSWER: TRUE
29
) PHOTOPERIODISM IS RESTRICTED TO CERTAIN GEOGRAPHIC 
AREAS 
Keywords
: Photoperiodism, restricted, geographic 
In paragraphs 2, 3 and 4 the writer refers to temperate zones – those parts of the world with a 
temperate climate. However, there is no mention of any geographical restriction of photoperiodism. 
30
) DESERT ANNUALS ARE EXAMPLES OF LONG-DAY PLANTS 
Keywords
: desert annuals, long-day plants 
In paragraph 4, the writer says: “Day-
neutral plants have an evolutionary advantage when the connection between the favourable 
period for reproduction and day length is much less certain. For example, desert annuals germinate, 
flower and seed whenever suitable rainfall occurs, regardless of the day length” desert annuals are 
examples of day-neutral plants, not long-day plants.