Get Readworks Frogs At Risk Answer Key

The model predicted that 1,012 of these previously unassessed amphibian species are Threatened and that more than half are Endangered or Critically Endangered.

Bacteria like salmonella, which is frequently carried by frogs and other reptiles, is dangerous to humans and in severe cases, causes death. ... Simply put, grabbing amphibians with unclean hands will not only cause stress, but the frog will absorb the chemicals lingering on your hands too.

Scientist Masayuki Sumida says the see-through animals provide new ways to study frogs. He says scientists can observe what happens to a frog's organs if it gets sick. "You can see through the skin how organs grow...," he says. "You can watch organs of the same frog over its entire life."

Disease, weather changes, and pollution are other causes of the decline in amphibian populations. Scientists are concerned about the decrease in the number of frogs. The health of frogs is closely linked to the health of the environment.

9. Why does the author of the article quote scientists Sumida and Collins? The author of the article quotes the two scientists to share their expert knowledge about see-through frogs and the benefits of studying them.

By having translucent legs and resting with the legs surrounding the body, the frog's edge is transformed into a softer, less contrasting gradient from the leaf to the legs, and again from the legs to the body, said Barnett, noting that this makes the frog's outline less recognisable to predators.

The reason for their unique appearance has gone mostly uninvestigated, but new research has found the frogs' glass-like skin helps them blend in and avoid being spotted by predators, reports Nicola Davis for the Guardian. Being see-through seems like the ultimate form of camouflage.

The world has lost at least 200 frog species since the 1970s, and hundreds more will face extinction in the coming decades, according to new research published last week in the Proceedings of the National Academy of Sciences.

How does the author organize the information in this passage? The author describes the cause and effects of a problem affecting frogs. The author compares and contrasts reptiles and amphibians. The author describes events in chronological order.