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Answer. Helen - Well, I'm afraid in fact that there are lobsters in the Pacific... In fact, there are various different species of spiny lobsters which don't have big claws like the American lobster, Homerus americanus, which does have big claws. That's one from the Atlantic. But there are some spiny lobsters, including the California or red ...
Answer. The reason blood is red is because it's got iron in it. If you look down a microscope at blood, what you'll see are thousands of tiny little red cells that are referred to as bi-concave discs. If you look at them from the side, they look like a number eight and that's because they've got a thick ring round the edge and a flattened ...
Immature red blood cells actually do have a nucleus but when they differentiate to become the mature red blood cells the nucleus is actually ejected, so they have no nucleus and no DNA. As to why this is and how they function, I think the answer is really lies in what they do. Red blood cells, their only real job is to carry oxygen around the body.
Answer. Bulls eyes are dichromatic - they have two colour-detecting pigments in their retinae. That means they can see red, but they can also see many other colours too. But, because they are dichromats they would see colours in a similar way to a colour blind person. In other words, there's nothing special about red; it's more likely to be ...
That leaves us with red sky in the morning, shepherd's warning. Well the reason for that would be that the sun is coming up in the east, and so the clouds would also have to be in the east. Since they're likely to be blown towards you during the day, potentially bringing bad weather, that's why red sky in the morning might be a shepherd's warning.
So because it's coming through more atmosphere even more at the blue light is taken away, making the sky look even more red than it was before. So that's why you get the red colouration of the sunset. The other thing that affects this is how many particles there are in the atmosphere, so you tend to see much redder sunsets and yellower moons at ...
Dying cells attract the immune system. They attract immune cells like macrophages that have to come in and eat up the dead cells. That encourages inflammation so you've got all these molecules called cytokines being produced. You've got inflammation redness, you may notice swelling as well if you get really sunburned. That's what's going on.
We posed this question to Professor Peter Rothwell from the University of Oxford...Peter - If you're one of the few people who gets bleeding from your stomach on Aspirin then that can occur very slowly, without you realising it and so, a very small proportion of patients do get anaemia, but in most patients, there's no effect on the blood count.
Answer. Yes, bulls can see red but they probably can't distinguish it from green. They only have one visual pigment in that part of the spectrum, which means that they can distinguish blue from other colours, but they can't distinguish red from green. They see the world like a red-green colour deficient person.
Answer. When you mix paint, it's a subtractive process. You start with white, and you're putting a layer of something on top of it, which allows a certain wavelength of light through but takes away everything else. So whatever you add, it always gets darker, and changes colour in a certain way. When you mix light, you're starting with black ...