Deoxyribonucleic acid, more commonly known as DNA, is a complex molecule that contains all of the information necessary to build and maintain an organism. All living things have DNA within their cells. … In other words, whenever organisms reproduce, a portion of their DNA is passed along to their offspring. Axit deoxyribonucleic, thường được gọi…
Bài mới
Tại sao chúng ta phải thở?
Not only does breathing provide your body with necessary oxygen, but it also rids the body of waste like carbon dioxide. To get rid of carbon dioxide, your blood delivers it to the capillaries surrounding your alveoli. In the alveoli, the carbon dioxide moves into the lungs, where it leaves the body when you exhale.…
Tại sao chúng ta phải ngủ?
Sleep is an essential function that allows your body and mind to recharge, leaving you refreshed and alert when you wake up. Healthy sleep also helps the body remain healthy and stave off diseases. Without enough sleep, the brain cannot function properly. Ngủ là một chức năng cần thiết cho phép cơ thể và tâm…
Có bao nhiêu thiên hà?
200 billion However later observations with the New Horizons space probe from outside the zodiacal light reduced this to roughly 200 billion. 200 tỷ Tuy nhiên, những quan sát sau đó với tàu thăm dò vũ trụ New Horizons từ bên ngoài ánh sáng hoàng đạo đã giảm con số này xuống còn khoảng 200…
Hành tinh nào nóng nhất trong hệ mặt trời?
Venus is the second planet from the sun and has a temperature that is maintained at 462 degrees Celsius, no matter where you go on the planet. It is the hottest planet in the solar system. Sao Kim là hành tinh thứ hai tính từ mặt trời và có nhiệt độ duy trì ở mức…
Bên trong Trái đất là gì?
The Earth’s interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball, about 1,500 miles (2,400 kilometers) in diameter. … Bên trong Trái đất bao gồm bốn lớp, ba lớp chất rắn và…
Nhiệt độ trên mặt trăng thế nào?
When sunlight hits the moon’s surface, the temperature can reach 260 degrees Fahrenheit (127 degrees Celsius). When the sun goes down, temperatures can dip to minus 280 F (minus 173 C). Khi ánh sáng mặt trời chiếu vào bề mặt mặt trăng, nhiệt độ có thể lên tới 260 độ F (127 độ C). Khi…
Mất bao lâu để bay đến mặt trời?
Apollo 10, the fastest manned spacecraft, traveled 24,790 mph. At that speed, it would take about 156 days to reach the Sun. The sun is not too far, only 93,000,000 miles away. So with a rocket traveling at 20,000 miles per hour, it will take only 193.75 days. Apollo 10, tàu vũ trụ có người…
Chuyện gì xảy nếu Trái Đất ngừng quay?
If the Earth stopped spinning suddenly, the atmosphere would still be in motion with the Earth’s original 1100 mile per hour rotation speed at the equator. … This means rocks, topsoil, trees, buildings, your pet dog, and so on, would be swept away into the atmosphere. Nếu Trái đất ngừng quay đột ngột, bầu khí…
Dãi Ngân Hà có di chuyển không?
The Milky Way as a whole is moving at a velocity of approximately 600 km per second with respect to extragalactic frames of reference. The oldest stars in the Milky Way are nearly as old as the Universe itself and thus probably formed shortly after the Dark Ages of the Big Bang. Toàn bộ Dải…