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In animals, the process involves a sperm fusing with an ovum, which eventually leads to the development of an embryo. Depending on the animal species, the process can occur within the body of the female in internal fertilization, or outside in the case of external fertilization. The fertilized egg cell is known as the zygote. [2] [5]
Resource availability is essential for the unimpeded growth of a population. Examples of resources organisms use are food, water, shelter, sunlight, and nutrients.[1][2] Ideally, when resources in the habitat are unlimited, each species can fully realize its innate potential to grow in number, as Charles Darwin observed while developing his theory of natural selection.
Salman "Sal" Amin Khan (born October 11, 1976) is an American educator and the founder of Khan Academy, a free online non-profit educational platform with which he has produced over 6,500 video lessons teaching a wide spectrum of academic subjects, originally focusing on mathematics and science. [1]
Khan Academy has been criticized because its creator, Sal Khan, lacks a formal background or qualifications in pedagogy. [46] Statements made in certain mathematics and physics videos have been questioned for their technical accuracy. [ 47 ]
A dragonfly in its final moult, undergoing metamorphosis, it begins transforming from its nymph form to an adult. Metamorphosis is a biological process by which an animal physically develops including birth transformation or hatching, involving a conspicuous and relatively abrupt change in the animal's body structure through cell growth and differentiation. [1]
These gentle sea creatures can grow up to 60 feet long making them the largest fish in the ocean. Answer: Whale sharks This “crazy, nasty” animal became a cultural phenom after a 2011 YouTube ...
A video of meiosis I in a crane fly spermatocyte, played back at 120× the recorded speed. Meiosis ( / m aɪ ˈ oʊ s ɪ s / ⓘ ; from Ancient Greek μείωσις ( meíōsis ) 'lessening', (since it is a reductional division) [ 1 ] [ 2 ] is a special type of cell division of germ cells in sexually-reproducing organisms that produces the ...
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia (/ ˌ æ n ɪ ˈ m eɪ l i ə / [4]). With few exceptions, animals consume organic material, breathe oxygen, have myocytes and are able to move, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development.