Science Math. How do some cells become brain cells and others become skin cells, when the DNA in all cells is exactly the same? What they All mammals have How do some cells become braoin cells and others becomme skin cells,when the dna in all cells is exactly the same?
Eukaryotic cells can divide by mitiosis or melosis. What is the difference between plant cells and animal cells? Animal cells also have a cell membrane, but lack a The difference between cheek cells and the rest is easier the cheek cells do not have chloroplasts at all.
What is the difference between prokaryotic cells and. Main difference between eukaryotic and paokaryotic cells is the nucleus. Prokariyotes do not have a nucleus. They are all cells or whatever. One difference between cell division in plant cells and in animal cells is that plant cells have a cell plate. Animals cell's have a cleavage furrow. I don't think there is any difference. Cells created by meiosis are sex cells, i guess they're the same as parent cells.
Log in. Consumer Electronics. Study now. See Answer. Best Answer. Study guides. Q: What is Difference between galvanized and alkalized cells? Write your answer Alkalized cells are a different type of galvanic cell, and they are typically more ordinary in design, and they don't contain metals. Learning more Cells and the study of cells fall under the scientific category of biology.
Cells are part of living organisms, and cells of different types behave according to a distinct set of rules. Learning about the different types of cells and the way they are used as building blocks in the human or animal, marine, etc. A car battery is different to the cells and batteries we usually buy.
When we have taken all the energy from the battery, we can recharge the battery and give it energy again. A motor car has a "generator" or "alternator " that takes energy from the engine and gives it to the battery while you drive the car. You will learn about generators in the next chapter. A cell-phone battery is also a rechargeable battery. In Chapter 7, you learnt about connecting bulbs in series or in parallel. You can also connect cells in series or in parallel. You might get confused between "bulbs in series" and "cells in series".
Look at the two figures below. The bulbs in Figure 10 glow brighter than those in Figure 9 because they share the 4,5 V from the cells in series, so they get 2,25 V each. The bulbs in Figure 9 share the 1,5 Volts from one cell, so they get only 0,75 V each. You might also get confused between "bulbs in parallel" in Chapter 7 and "cells in parallel".
In Figures 11 and 12, each bulb gets1,5 V. Therefore, the bulbs in these figures glow brighter than those in Figure 9 0,75 V per bulb , but dimmer than those in Figure 10 2,25 V per bulb. Compare the circuits in Figures 12 and Each circuit has three cells and one light bulb, but the components are connected differently.
Explain your answer. This photo shows a type of energy input device that you learnt about in Chapter 7. In this device, the energy it gives does not come from reactions between chemicals.
Instead, it gives energy that comes from light. This device is called a photovoltaic cell. Photovoltaic comes from "photo" meaning "light" and "voltaic" meaning you can get volts from the device. The black parts in this picture are a special substance called a semiconductor.
This semi-conductor substance is made of thin layers, like sheets of plastic laid on top of each other. When light hits these special layers, the energy of the light is given to electric charges in the layers. The positive charges gather on one side and the negative charges on the other side. When charges are separated like this, there is potential energy between them. If you connect wires to the positive and negative sides, the charges will flow through an output device such as a bulb, beeper or motor.
People often store the electrical energy generated by photovoltaic cells in a rechargeable electrochemical battery. The photovoltaic cells generate electrical energy during the day when the sun shines, and this energy is then stored in the rechargeable battery. When it is dark at night, the photovoltaic cells do not generate any electrical energy.
But then people can use the electrical energy stored in the rechargeable battery to power lights and other devices. Where we use photovoltaic batteries. Perhaps someone in the class has a calculator that has a little photovoltaic battery. When you hold the photovoltaic cell in sunlight, the calculator can switch on. It will work even if you move it into the shade since it has a little battery that stores the energy. Photovoltaic cells can be very big.
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