My previous understanding of "biology" was simply "animals". I have studied biology in middle school and know that biology covers a wide range, not only animals, but also plants and microorganisms. There are about 300,000 kinds of plants and 1.5 million kinds of animals on the earth. I learned some unusual plants from biology books, such as spinulosa spinulosa, fern and cycad, and also solved some problems that I didn't understand when I was a child. Once, I dug earthworms in dry soil, but I couldn't. Now I know that earthworms live in dark and humid places, and of course they can't dig in dry soil. Why do cactus leaves degenerate into thorns? Because of the need to adapt to the environment, in order to reduce the loss of water and store more water, the stem of cactus has become thick and juicy. Biology helped me understand the problem, which is one of the reasons why I like biology.
Walking into the second unit, I learned about the microscope. In my mind, the microscope is so wonderful that I always want to use it to observe things. I haven't touched it in elementary school. I remember the first time I entered the biology laboratory and saw the microscope on the table. I feel an uncontrollable joy. So I couldn't wait to look at the eyepiece, but all I could see was darkness. In class, the teacher said that observing things with a microscope is not as simple as expected, and it takes several steps, such as aiming at the light, selecting the objective lens, making temporary slide specimens and adjusting the clarity. I listened carefully, trying to remember every structural name. With the help of the teacher, I finally saw the cells through the microscope. At that time, I felt a sense of accomplishment, as if I had become a scientist and could observe microorganisms with a microscope! There is also a strange phenomenon, which is inverted under the microscope. Nowadays, using a microscope has become a common practice, and experiments have to be done in almost every class. Observing things invisible to the naked eye with a microscope can make me happy and stimulate my interest in learning biology.
In addition, I have a new understanding of organisms. All living things are made up of cells except viruses. The cells seen under the microscope are arranged one by one. Plant cells are composed of cell walls, cell membranes, vacuoles, nuclei, mitochondria, cytoplasm and chloroplasts, while animal cells are composed of cell membranes, cytoplasmic nuclei and mitochondria, and their functions are also different. The nucleus is made up of chromosomes, and chromosomes are made up of DNA ... Don't underestimate a small life, its structure is very complicated! I didn't know where the water in the fruit came from before, but from the fine vacuoles in the vacuoles. I'm always sick. After learning biology, I realized that the virus was playing tricks on me! Even viruses are creatures, which is incredible! I'm getting more and more curious about biology.
Biology brought me into a wonderful world. Solving difficult problems broadens my mind. Using a microscope makes me happy. Microbes make me curious. Therefore, I have a strong interest in biology.