The essay on the discovery of plants is about 400 words, thank you

Today, I saw the endless desert on TV. Suddenly I saw a few cacti, and two questions came to my mind: 1, the cactus asked what can survive in the desert, 2, what is the function of the cactus's thorns.

I ran over to my dad and he said, "You can find out for yourself." So I bought a cactus and observed it myself for 10 days, but I still didn't find anything. Mom came up and said, "Why don't you look up the books?" "This proposal struck me. ”

I found the encyclopedia, oh it turned out that the cactus asked what can survive in the desert because the climate in the desert is hot and the rain is scarce. The temperature difference between day and night is large, and many plants cannot grow here. The reason why the cactus can survive in the desert is that its roots are very deep in the sand, which absorbs water, and second, its stalks become fleshy and can store a lot of water.

The third is to degenerate the leaves into needles to reduce water evaporation, so they can survive in the desert.

What does the cactus spine do because the cactus thorn is a degraded cactus leaf, it protects the plant from being eaten by herbivores, and it also absorbs water from the air, and if it rains, it can also absorb rain constantly.

I've learned that as long as you use your brain, you can solve problems, and you can't look up books.

There are a few mimosas on the lawn in our community, and because they are different, they arouse my curiosity, so I pay special attention to observe them. In spring, the mimosa sprouts, tender green and green, and the pole is only 1 to 2 decimeters long. In summer, the mimosa branches are luxuriant, and the leaves are very peculiar, a very thin stem, and there are some thin needle-like things on both sides, much like the leaves of the metasequoia tree.

In autumn, the mimosa blooms, and the small flowers are fluffy, some pink, some purple. Although it is small and inconspicuous, when you look closely, you will feel that it is beautiful and cute, it is a squeamish beauty, and it is very attractive. In late autumn and early winter, the mimosa bears fruit, and the fruit is like a lentil, with a green shell on the outside and seeds on the inside.

After a while, the shell turns brown, and soon the seed jumps out of the shell, lands on the soil, and takes root and sprouts the next spring, and so on and so forth, from generation to generation, and it is no different from any other plant. One wonders why when you touch it, the leaves droop and close. I couldn't figure it out, so I had to look for information on the Internet.

It turns out that mimosas used to live in the desert, and tornadoes often occur in the desert, and when the sand picked up by the wind touches the leaves of the mimosa, the mimosa will feel very painful, and the leaves will close. In the long run, it becomes a grass that simply closes its leaves when it touches it. On the stem of the petiole of the mimosa, there is a sac that stores the liquid, which looks like a cylinder in a hydraulic press.

When you touch the leaves, the liquid in the pouch flows to the upper part and both sides of the leaves, and the leaves close under the action of gravity, and after a while of calming, the liquid slowly flows back to the pouch from both sides, and the leaves are restarted. Sometimes, I deliberately touch them and joke with them. The cactus I raised had a flattened stem and many thorns growing on it.

I once heard from my teacher that the cactus was adapted to the desert climate, so that the leaves turned into thorns, the stems became fat and fleshy, and there were many hairs. The reason for its enlarged stems is to store nutrients during the rainy season and reduce water evaporation during the dry season. And I was struck by its "survival of the fittest" strain.

However, what shocked me even more was an incident that happened during the summer vacation. I remember during the summer vacation, my cousin, who was four years older than me, came to visit, and somehow he had a sore on his foot, and he screamed in pain, and he could be said to be restless. Later, my mother found a home remedy from a book:

Cut off the cactus, mash it and apply it to the sore. When I heard this, I cried out, "Want to cut my baby?"

No way! "My mother and brother had been preparing for a long time before I promised them to cut off a piece. After a few days, the sores on my cousin's feet disappeared.

At this time, I can't help but be in awe of the cactus cute little Lori.

A narrative essay about plants.

On the balcony of my house, there is a very inconspicuous pot of cacti.

The cactus' body resembles a piece of emerald, and it resembles a cute little hedgehog. Its whole body is covered with thorns like steel needles, don't underestimate these thorns, this is the ** it uses to defend itself! I was stabbed by it, and my mother was stabbed by it, and it hurt terribly.

My mother tried to throw it away many times, but I refused because I had a special affection for it, and I loved the cactus.

Spring came, everything woke up, and a small cactus was drilled into the body of the cactus "mother", and the little cactus looked so weak and so brittle, as if a gust of wind could blow it away. And its "mother" is afraid that her children will be "bullied" by the cold wind in early spring, and always uses her body to block the cold wind, but the little cactus always drills up, and finally, with the encouragement of Grandpa Chunlei and the help of Sister Chunyu, the little cactus overcame many difficulties and grew up.

In late spring and early summer, the cactus grows buds, and it is strange to say that the cactus blooms in a very "order", always two flowers bloom together, like a pair of twin sisters, and like a bow tied on the head of a little girl. The cactus flowers bloom white and fragrant, like a beautiful fairy wearing a white dress, while dancing gracefully on the jade stage, from the dress, exuding an intoxicating fragrance.

In autumn, the harvest season, the cactus grows, and it can be used for many purposes! It can be cut into slices and brewed into a cool and delicious tea to quench your thirst. It can also be eaten, it is rich in nutrients, and it can be used as a bonsai ......It's really too much to say, but the most surprising thing is that it can be boiled into a potion to cure diseases.

People love the magnificent peony and peony, the autumn chrysanthemum in a variety of forms, and the fragrant osmanthus ......But I love the cactus only because of its appearance, but also because of its quality.

Sunflowers.

There are many kinds of flowers in the world, such as: magnolia, moon flower, rose, plum blossom, chrysanthemum, junzi orchid, camellia and so on. However, the flower with the most flowers and the most abundant colors is the sunflower.

As the saying goes: "Good flowers don't bloom often". Sunflowers are also good flowers, with red, yellow, white, purple, crimson, orange ......The petals of the sunflower are single-layered, shaped like plum blossoms, with red and black filaments with yellow dots on the core.

The stems of sunflowers are long, thin, soft, and curved. Its branches are thin, the leaves are dense, and the flowers are quite numerous.

Sunflowers bloom only when they see the sun, and every day when the sun rises slowly in the east, the sunflowers scramble to open their smiling faces. When the breeze blows, Sunflower "shakes its head" and seems to be reciting poetry, and seems to nod to pedestrians. The bones of the sunflower are red and the size of a soybean.

Unlike other flower bones, they are short and round.

The flower seeds of the sunflower are surrounded by a few small leaves. The flower seeds are as big as sesame seeds, and when the small flower seeds are ripe, they are scattered in the arms of the grandfather of the earth, and after being moistened by the sun and rain, they can grow and bloom more beautiful sun flowers in the second year.

The vitality of the sunflower is very strong, she sucks the nectar given to her by Grandma Blue Sky to her heart's content, and she greedily absorbs the nutrients of Grandpa Earth. Sunflower thrives under the care of Grandpa Earth and Grandma Lantian, dressing up the motherland more beautifully and adding to the beautiful nature.

At night, the sun is like a child after a day of play, tired and relieved to fall asleep.

Trumpet flowers are also good flowers, it blooms early and loses late, it and sunflowers seem to be a pair of good sisters, they agree to open together, enter sweet dreams together, never bloom early, fail early, and decorate this beautiful nature together. They give themselves selflessly and never ask for anything in return from the motherland or from the people.

Although the sunflower does not have the nobility of roses, the fragrance of chrysanthemums, the purity and elegance of magnolias, and the fragrance of plum blossoms, sunflowers have the spirit of selfless dedication.

I love the sunflower, its tenacious and vigorous vitality, and I love its selfless dedication.