ONE.True or false questions
1.( ) When he went to the zoo on holidays, Xiao Ming saw lions with sharp claws, and the explanation board explained that this was a structure that could help them hunt prey.
- [Children's problem-solving instructions]: Right! Lions are carnivorous animals, and their sharp claws on their feet are like natural knives and forks, helping them hold on to and catch their prey!
2.( ) In order to adapt to the environment, amphibian frogs live on land from childhood to adulthood and breathe through their lungs.
- [Children's problem solving explanation]: Frogs are "amphibian" animals. They were called "tadpoles" when they were young, and they lived in water and breathed through their gills! It will not run to live on land until it changes its appearance when it grows up.
3.( ) After heavy rain, the soil in the campus flower garden has too much moisture, and earthworms will burrow out of the soil because it is difficult to breathe.
- [Children's problem-solving instructions]: That's right! Although earthworms like moist soil, if it rains heavily, the soil is full of water and no air, and earthworms will not be able to breathe in the soil, so they have to quickly get into the ground to breathe.
4.( ) Cats have pads on the soles of their feet, mainly to make louder noises when walking to scare away prey.
- [Children's problem-solving instructions]: It's just the opposite! The soft pads on the soles of cats' feet are designed to allow them to walk "quietly", so that they can sneak up on mice or birds and are not easy to detect.
5.( ) When observed in the wild, the body color of the Svenhow's climbing lizard is very similar to that of a tree trunk, and this body color similar to the environment can help it hide and is not easily detected by natural enemies.
- [Children's problem-solving instructions]: Yes! This is called "hidden color" (protective color). Make yourself look like bark, like wearing an invisible cloak, and animals who want to eat it will not be easy to spot it!
6.( ) The turtles in the aquarium, like the freshwater turtles in the ecological pool, have webbed feet to help them swim in the water.
- [Children's problem-solving instructions]: Pay attention to their feet! The freshwater turtles in the ecological pond have "webs" on their feet, but because sea turtles have to swim in the sea for a long time, their limbs have evolved into "fins" like oars, which is different from freshwater turtles.
7.( ) We can determine whether the animal is a mammal by whether the mother can secrete milk to nurse the young, such as brown bears and polar bears.