Explanation for Question 23 From the Reading Section on the 2019 April Sat
For 23, we want to know which choice best supports the idea that the 2 ability of a species to use camouflage effectively can provide an evolutionary 3 advantage. So we have lines one to two, 4 two to seven, seven to nine or 10 to 13. 5 If we start looking at those lines. 6 So one to two says it is well known that some animal species use 7 camouflage to hide from predators. Doesn't really talk about anything involving 8 an evolutionary advantage. So not one to two. 9 Then if we look at two to seven individuals that are able to blend 10 into their surroundings and avoid being eaten are able to survive longer, 11 reproduce and thus increase their fitness pass along their genes to the nest 12 next generation, to compared to those who stand out more. 13 So I think that does talk about an evolutionary advantage. 14 They can survive, they can reproduce and pass on their genes to the next 15 generation. 16 So lines two to seven are looking really good. 17 Seven to nine says this may seem like a good strategy and fairly common 18 in the animal kingdom, but whoever heard of a plant doing the same thing. 19 So not really talking about evolution, just saying animals, 20 do this, do plants do it. So not really relevant here. 21 And then 10 to 13 and plants the use of coloration or pigmentation 22 as a vital component of acquiring food EG photosynthesis, 23 or as a means of attracting pollinators. 24 EG flowers has been well studied. 25 So again, not talking about evolution, just talking about, 26 um, plants using pigmentation to get food and attract pollinators. 27 So our best choice was lines two to seven, 28 which is choice C B.