阅读分类段子,好句积累
Biology
1.Camouflage is hiding oneself from one’s enemies.Some animals do this to protect themselves from their enemies.They do it to catch food.Frogs, butterflies, and snakes and snakes are examples of such animals.They change their colors or shapes to match their surroundings.With camouflage, they look like gra, leaves, or stones.This improves their chances of survival in the wild.
2.The diversity of species must be a priority for the next generation.
3.Cells are the basic structural unit in the human body.We have about 100 million of them.They are not all the same types, however.They develop to have specific functions, forming organs, muscles, nerves, skin, and bones.Each body part has a special cell type.However, one type of cell, a stem cell, can grow into any of the other cell types.
4.DNA is a molecule that contains the blueprint for life.It controls how the body develops as it grows.It transfers the genetic traits of parents to their offspring.DNA is found in each of the 100 trillion cells of the human body.Each person has a set of DNA that is completely unique.
5.With this type of organization, the colony is able to achieve more than a single individual ever could.
Agriculture
Organic farming usually needs a lot of human labor to do the job of chemicals.This is one reason that organic food costs more.But when we think about the health of the earth, its plants, and its animals, perhaps it is worth it.In the end, a healthy planet means that we will healthy, too.
Sumerian Civilization The Sumerian made many advances.They first improved agriculture.They later established which was eential for storing crops.Then it was used for grinding grain.Last, it was then used for farm and military vehicles.Sumerian were the first to use writing and math, even systems were used to keep track of food storage and trade.The military used it to keep track of men, weapons, and supplies.They were the first to study the stars and sun in a serious way.It helped them tell time so they could decide when to plant crops.A way of reading the stars also helped them plan when to attack their enemies.They believed that the stars could speak of their succe or failure.
