It is in every cell (细胞) of our bodies. It carries important 1.(information) about our genetic history (史). DNA tests can help us understand ourselves. Twenty 2.(pupil) from Atlanta, the US, took one of these tests.Last fall, they studied 3.(life)science. During their study, ...
1 The figure below is an electron micrograph of a section of a cell.What is the function of the organelle shown in the figure? B A control movement of substances into the cell B package substances for secretion C release of energy from glucose D synthesis of lipids and proteins 相关知识...
A cell is a mass ofcytoplasmthat is bound externally by acell membrane. Usually microscopic in s...
Before you or a loved one get a stem cell treatment, ask two key questions. First, is the treatment FDA approved and if not, why not? Second, can you please show me the data that proves your treatment is safe and effective? See what kind of answer you get. If they criticize the FD...
pointed.(我猜你这里是从生物的角度问的)cell: (biology) the functional basic unit of life (cell这里是指细胞，生命中的最小功能基本单元)Why is it important?Because all the vital functions of an organism occur within cells.（因为所有必需的生物有机体的功能作用都是在细胞内进行的）翻译...
But she found that she also shares DNA with people from Afric a and Europe.The test changed how they see themselves.They realized they "have family from everywhere".1. What do we know about DNA? a. Many people share the same DN A. b. It is in every cell of our bodies. c. It ...
Stem cell therapy has potential applications in surgical repair. What is the unique property of stem cells that makes them useful in this area? A. They can only differentiate into one type of cell B. They are unable to self - renew C. They can differentiate into various cell types D. ...
In fact, these traits are precisely what make a cell a cell. What Defines a Cell? Figure 1: Transport proteins in the cell membrane A plasma membrane is permeable to specific molecules that a cell needs. Transport proteins in the cell membrane allow for selective passage of specific ...
US company Motorola created the first cell phone in 1973. The brick-sized phone could only make calls for 30 minutes. Today, we have 5G smartphones that look very different and can do a lot more. What will the future phones be like?
Nectar is mainly a sugar solution, while pollen is a grain made up of part of the plant's cell structure. In both nectar and pollen production, quality and quantity vary over time. But they are always related to the needs of the pollinator. You can see that the relationships between poll...