Answer Choices
The acquisition of flight in young birds sheds light on the acquisition of flight in their evolutionary ancestors.
The tendency of certain young birds to jump erratically is a somewhat recent evolved behavior.
Young birds in a controlled research setting are less likely than birds in the wild to require perches when at rest.
Ground-dwelling and tree-climbing predecessors to birds evolved in parallel.
Explanation for Question 23 From the Reading Section on the Official Sat Practice Test 3
Question 23 says what statement best captures can dial central assumption in setting 2 up his research. So let's look at the passage and get some context 3 here so we can see it starting in line for the 4 motivation for his research. So it says they jumped up like popcorn. 5 He said describing how they would flap their half-formed wings and take short hops 6 into the air. So when a group of graduate students challenged him to come 7 up with new data on the age, old ground, up tree, 8 down debate, he designed a project to see what clues might lie and how 9 baby game birds learned to fly. So he's being motivated by this group of 10 graduate students and the way he's going to go about addressing this ground-up tree 11 down debate is by looking at how baby birds learned to fly. 12 And this is kind of a lesson in why it's always important to read 13 that little paragraph before the passages, 14 because the paragraph before it gives us some information on what the ground up 15 tree down to bait is. 16 So it says the ground up theory assumes they were fleet footed, 17 ground dwellers that captured prey by leaping and flapping their upper limbs. 18 So I should have read the part before it, it says scientists have long 19 debated how the ancestors of birds evolved the ability to fly. 20 So the ground up theory says that ground dwellers captured prey by leaping 21 and flapping their limbs. And then the tree down theory assumes they were 22 tree climbers that left and glided among branc...