Category: Articles

How is light detected by a plant? Photosynthesis uses light energy to turn carbon dioxide and water into sugar, so plants need to detect light sources to get food. We now know they do this using phototropins – light receptors in the membranes of cells in the plant’s tip. Plants see red light using receptors […]

What is the behavior of the humpback whale? Behavior and Diet Humpback whales are a favorite of whale-watchers, as they can be found close to shore and often display activities near the surface, such as breaching (jumping out of the water) or slapping the surface with their pectoral fins and tails. What are the behavioral […]

What is a piece of Treen? Treen (literally “of a tree”) is a generic name for small handmade functional household objects made of wood. Before the late 17th century, when silver, pewter, and ceramics were introduced for tableware, most small household items, boxes and tableware were carved from wood. Why is it called Treen? Treen […]

How much current can a 555 timer handle? The output circuit of a 555 timer can handle as much as 200 mA of current, which is actually much more current than most integrated circuits can source or sink. If you need to drive a device that requires more than 200 mA, you can isolate the […]

How do you turn saltwater into drinking water? Humans cannot drink saline water. But, saline water can be made into freshwater, which is the purpose of this portable, inflatable solar still (it even wraps up into a tiny package). The process is called desalination, and it is being used more and more around the world […]

What vibrates when you hit a drum? The skin of the drum vibrates and makes the confetti dance. As the air molecules vibrate against each other, sound waves are formed and the sound of the drums can be heard. Hit a drum hard and this makes big vibrations and a loud sound. Why do grains […]

Can you permanently delete Kindle books? On Amazon’s website, go to your “Manage Your Content and Devices” page. In the “Your Content” list, select the boxes next to the book(s) you’d like to remove. Select Delete. Select Yes, delete permanently to confirm. How do I permanently delete books from iPad? How to delete books, audiobooks, […]

Does iPhone 4s have memory card slot? These devices each carry a brilliant AMOLED screen, an 8-megapixel camera that records 1080p video, a 2-megapixel front-facing camera, 16GB of onboard memory and a microSD slot that can take up to a 32GB memory card. Where is the memory card in an iPhone 4? For example, the […]

Why is immigration such a long process? That’s largely due to two reasons. First, there are limits on the number of U.S. green cards (lawful permanent residence) made available under U.S. immigration laws, at least in certain categories. Warning: The coronavirus or COVID-19 pandemic has resulted in long delays in every part of the immigration […]

What bone forms the bony eyebrow ridges and roofs of the orbits? Bones Question Answer Forms the bony eyebrow ridges and roofs of orbits Frontal Forms the chin Mandible The only bone connected to the skull by a freely movable joint Mandible Site of the mastoid process Temporal What are the 4 main facial bones? […]