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Ciências Naturais (260)
Ciências Sociais, Geografia e História (6)
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Video Biología
"Cladistics is the method of classifying organisms into groups called clades. Clades consist of an ancestor organism and all of it's decedents and one branch is the tree of life. Cladograms are diagra ...
Video Biología
"The circulatory system transports nutrients and blood cells to and from cells throughout the body. Blood is oxygenated in the lungs then sent back to the heart to be pumped to the rest of the body in ...
Video Biología
"When looking at the structure of plants, we can classify the plant structure into two major regions: the stem and the roots. The plant stem is typically above ground and supports the plant leaves. Th ...
Video Biología
"Plant reproduction is the creation of new offspring through asexual or sexual reproduction. In plant reproduction, flowers attract pollinators. In flowers, the stamen are the male parts while the pis ...
Video Biología
"Like the Animal Kingdom, the Plant Kingdom is also a major part of the Linnaean system of classification that includes organisms like trees, bushes and grasses. The plants in this kingdom can be call ...
Video Biología
"Plant hormones are chemicals that promote or inhibit growth in plants. There are 5 main types of plant hormones. Auxin, commonly abbreviated as IAA, gibberellins and cytokininins all promote plant gr ...
Video Biología
"Plants grow using things called meristems which are layers of cells capable of rapid cell division. There are two types of meristems: (1) the shoot apical meristem where the plant grows taller and gi ...
Video Biología
"Plants have developed a number of adaptive mechanisms over time to aid in their reproduction and growth. Several things that plants have developed to aid in their adaptation include roots, vasular ti ...
"When two genes are located on the same chromosome they are called linked genes because they tend to be inherited together. They are an exception to Mendel's law of Segregation because these genes are ...
Video Biología
"The chloroplast is the organelle in which photosynthesis takes place. Inside the chloroplast there are disk like structures called thylakoids arranged in stacks called granum. The light dependent rea ...
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