Is a starfish a fish? No, starfish are not fish. Fish are vertebrate animals that live in the sea, have gills to breathe through, have a two chambered heart, are cold blooded, and have a brain and central nervous system. Starfish live in the sea, but that is where the similarity stops. These days, many […]
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What is a nerve? They are bundles of nerve fibers called axons that connect neurons. They look like cables. Their job is to transmit electrical impulses. All animals have nerves. They are the only way that living organisms can send signals from their brain to their muscles or parts of their bodies. The only animals
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Are symbiotic relationships always beneficial to both parties? No, they aren’t. There are mutualistic, commensalistic, and parasitic symbiotic relationships. The word symbiosis means “a close, prolonged association between two or more different biological species”. It originates with the Greek word symbiosis and means living together. We tend to think that a symbiotic relationship is beneficial
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How do steroids work? They stimulate the production of protein in the muscles and make more cells grow. However, there are many different types of steroids. When people talk about steroids, they are usually referring to anabolic steroids, which are the ones that bodybuilders use. Steroids are found in many living organisms, and they are
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Why can fish swim so fast? They move their bodies from side to side in such a way that they produce a backwards moving wave in their bodies, which pushes against the water, producing thrust. Also, they are very streamlined. First, we should clear up the fact that all fish are fast. There are some
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Why are bees transported across countries by truck? Bees are the largest pollinator of many of the foods we eat and they have to be transported to where the foods are grown. Bees are the most common pollinator but not by any means the only. Bees travel from their hive to find flowers. When they
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What animals and insects are pollinators? A large variety of animals and insects are pollinators. Many of us might think that flowers are only really pollinated by bees and butterflies when, in actual fact, there are a huge number of insects, reptiles, and mammals that are responsible for pollination. What is pollination? A plant has
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Why do tattoos stay in the skin forever? Because the particles of ink are too big for the body to absorb and expel. When you have a tattoo, the tattooist uses a needle to put ink particles into your skin. Skin has three layers, and the ink is injected into the middle layer, the dermis.
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What are moles, freckles, and birthmarks? Moles are caused when pigment-producing cells grow in a group. Freckles are caused when your skin cells produce too much melanin. Birthmarks are caused when blood vessels don’t form correctly or when the cells that produce pigment grow too much. Almost everybody has moles. By moles, I obviously don’t
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Why did some dinosaurs have such long necks? To reach the higher up vegetation, to get more low-lying vegetation, to expend less energy, and to lose heat. There are several different types of dinosaurs that evolved long necks. The most famous that we probably all know is the diplodocus. The diplodocus was undoubtedly large. It
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