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Condrictes: The Cartilaginous Fish
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Condrictes: The Cartilaginous Fish

Sharks, rays and chimeras (deepwater fish, also called ratfish) of this class (Greek chondros = cartilage + ichthys = fish) are the most primitive living vertebrates with complete and separate vertebrae, movable jaws and even fins. This group is ancient and represented by numerous fossil remains.

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Thyroid

The thyroid produces thyroxine, a hormone that controls the body's metabolism speed. If hyperthyroidism occurs, that is, exaggerated thyroid function, all metabolism is accelerated: the heart beats faster, the body temperature is higher than normal; The person loses weight because it spends more energy.
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Diabetes

What is diabetes, how does it occur, what are the main symptoms? Diabetes is a disease that causes an increase in the amount of sugar (glucose) in the blood due to absolute or relative lack of insulin. Increased Blood Glucose We turn much of the food we eat into glucose.
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The Whys of the Animals (continued)

What is the biggest whale in the world? It is the blue whale. Adult can measure 30 meters in length! However, she only eats tiny animals. If not hunted can live more than 50 years. Why do whales expel large jets of water? Whales can dive for almost half an hour holding their breath, but they are forced to rise to breathe.
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9 Curious Facts About Your Body

We do not know our own body. Do you know how many liters of blood are in your body? Or how many times do you blink and breathe per minute? Do you know your face is home to a bacterial colony? Check out some curious facts about the human body: 1. We breathe 12 to 20 times per minute Respiratory rate is the number of breaths you give per minute.
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Washing your hands with dishwashing detergent is it bad?

The answer to this question seems to be quite logical. After all, if dishwashing detergent could normally be used to sanitize the human body, we wouldn't even need soap, because we would use detergent even for bathing every day. However, the fact is that the dishwashing detergent ends up cleaning the hands.
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What would happen to us if all insects ceased to exist?

If you, like most people, have ever wanted all insects to disappear from the face of the earth - especially on those warm nights when mosquitoes don't let you sleep - know that your life and that of other complex living things would be too much. worse without them! But, before, how about knowing a little more about these animals?
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5 facts and curiosities about orcas, the "killer whales"

Although we call the killer whales "killer whales," the mammal, which is actually a dolphin, typically does not attack humans. Incidentally, no attack has ever been reported on any man or woman in the open sea. This nickname comes for its incredible ability to hunt other sea animals such as seals and dugongs.
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Biology Tricks (part 2)

Taxonomic Levels To memorize the sequence: Macete 1: The King was clearly proud of the chosen son-in-law's family. Macete 2: Strong Lightning Yesterday. F = phylum; C = class; O = order; F = family; G = gender; E = species. Nitrogen Bases Macete: In DNA - Agnaldo Timoteo and Gal Costa A = adenine; T = thymine; G = guanine; C = cytosine No RNA: Replaces Thymine with Uracil Purified Nitrogen Bases Macete: PURE Water A = adenine; G = guanine; PUR = puric messenger RNA The 3 cracks that can never finish an mRNA ribbon will be: UAA UAG UGA trick: UA mor Ado UA mor G loved UG loved A mor The phases of mitosis I will warm My friend Tereza P = prophase; M = metaphase; A = anaphase; T = telophase Phases of Prophase I Macete1: Linda ZebraStaying During the DayMacete2: ZEvaLightForDistent Yes, L = leptotene; Z = zygote; P = pachytene; D = diplomat; D = diakinesis.
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Cows are more responsible for climate change than you think

Beef and Dairy Production Emits More Gases Than Means of Transport If we combine all the gases emitted by conventional means of transportation - cars, trains, boats, and airplanes - we would not get as much as cows 'produce'. The beef and dairy industry accounts for 14.5% of all greenhouse gases.
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7 Facts We Believe About Animals, But We're Wrong

What adjectives come to mind when you think of pets like dogs, cats, pigs, and sloths? Are qualities such as loyalty, indifference, coolness and loitering, for example? For, according to Beth Brindle of how stuff works, all these stereotypes are not only common but universal - though they don't always correspond to reality.
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Pigeons and diseases

Do you think pigeons are nice animals? Did you know that the white dove is a bird considered a symbol of peace? Perhaps what you do not know is that pigeons can pose serious health risks to the population. Many people like to feed them with pieces of bread, leftover food, popcorn, which are inappropriate foods that addict animals and harm their health.
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Biosphere

We are not yet aware of the existence of any other place in the universe than Earth, where the phenomenon we call life happens. Life on earth is possible because sunlight comes here. Thanks to its position in relation to the sun, our planet receives an amount of solar energy that allows the existence of water in liquid state, and not only in solid state (ice) or gas (vapor).
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The Major Brazilian Ecosystems (continued)

Restinga The restinga is typical of the Brazilian coast. The beings that inhabit this ecosystem live in sandy soil, rich in salts. Part of this soil is submerged by the high tide. In this ecosystem we find animals such as flour marsh, beach beetle, black widow, sparrow hawk, burrowing owl, bloodshot and frog, among others.
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Cannibalism

Inharmonious relationship in which an individual kills another of the same species to feed. Ex .: praying mantis, arachnids, shark cubs in the womb. Mantis - The mantis is an arthropod of the insect class (family Mantoideae). This insect is green and is named after the position of its front paws, together with folded tarsi, as if praying.
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Embryonic Annexes: Adaptation to the Terrestrial Environment

Embryonic attachments are structures that derive from the germinal leaflets of the embryo but are not part of the embryo's body. Embryonic appendages are: vitelline vesicle (vitelline sac), amnion (or amniotic sac), chorion and allantoid. Vitelline vesicle During the evolution of the animal group, the first vertebrates that emerged were fish, a group that has the only embryonic annex the vitelline vesicle.
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Mammals: The placenta appears

In most mammals, embryonic development occurs within the mother's body, within a muscular organ, the uterus. Except for egg-laying mammals (platypus and echidna), all the others form the placenta, an organ consisting of the vascularized inner wall of the uterus (endometrium) and structures derived from the embryonic trophoblast or tropoderm (in mammals, the name given to the outermost chamber of the uterus). embryo lining).
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The egg and the yolk

In poultry, the term egg can be used for the whole set of shell, egg yolk; or be used in the strictly embryological sense: fertilized egg or zygote. In chickens, oocyte II is released from the ovaries and enters the oviduct, where it can be fertilized by sperm. Embryonic development begins in the oviduct and is completed outside the bird's body.
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Evidence of evolution

The clarification of the mechanism of action of biological evolution was only concretely obtained from the works of two scientists, the French Jean Baptiste Lamarck (1744 - 1829) and the English Charles Darwin (1809 - 1882). The evolutionary discussion, however, raises great controversy. For this reason it is necessary to describe initially the main evidence of evolution used by evolutionists in defense of their thesis.
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Etiquette Tips

Sustainable Planet The Sustainable Planet movement is part of a project that aims to soften our impact on the environment. This project suggests some changes in our habits that aim to reduce the consumption of three essential and limited resources: Water, Electricity and Fuels. Water - It falls from the sky, but is a rare and exhaustible resource in many parts of the world.
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Food chain

Ecological balance depends directly on the interaction, exchanges and relationships that living beings establish with each other and with the environment. Beings breathe, live on the ground or in water, obtain food, bask in the warmth of the sun, shelter, reproduce, die, decompose, and so on. In these processes, air, soil, water, and sunlight interact intensely with plants, animals, and other living things.
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