13.And penguins press their backward-facing, centimeter-long, spiny tongue and palate papillae together to secure their slippery catch and direct it into their gullet.
16.It was basically a big, tank-like roomba, slowly combing the sediment at the bottoms and banks of swamps and rivers with spiny sweep-feeding appendages.
17.He said at one time, they were covered with spiny urchins, but now they are covered in algae, sick from disease and stressed by rising water temperatures.
20.Right. As you know, Australia has many unique species of animals due to its long geographical isolation, such as kangaroos, wallabies, koalas, wombats, dingoes, possums, platypuses, spiny anteaters and so on.