Genetic variation can<span> be </span>caused<span> by </span>mutation<span> (which </span>can<span> create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).</span>
<span>The product of fertilization is a one-cell embryo with a diploid complement of chromosomes. Over the next few days, the mammalian embryo undergoes a series of cell divisions, ultimately leading to formation of a hollow sphere of cells known as a blastocyst. At some point between fertilization and blastocyst formation, the embryo moves out of the oviduct, into the lumen of the uterus.The images below demonstrate major transitions in structure during early embryogenesis in cattle. Note that in all of the the early stages, the embryo is encased in its zona pellucida. Embryos from other mammals have a very similar appearance, and the general sequence of stages is seen in all mammals.
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Answer:
The correct answer is - 1000:1
Explanation:
Prokaryotic cells are unicellular organism of the domain prokaryotes and archaea. These cells lacks cell organelles however other components such as plasma membrane, cytoplasm and DNA. The size of the prokaryotic cell ranges between 0.1 to 5.0 µm.
On other hand eukaryotic cells also contain cellular structure like plasma membrane DNA , cytoplasm but also include true nucleus and other cell organelles that are double membrane bounded. The average cell size of these cells are tend to be - 10 to 100 of the cell size
Thus, the correct answer is - 1000:1.
Answer:
respuesta
Explanation:
yo se mucho o lo necesario de jardineria me se el tutorial y se lo q se necesita saber para plantar un arbol etc
se como cuidar plantas y regarlas etc
eso es lo q se lo necesario
espero ayudar
si no hablas español aqui esta mi respuesta en ingles
I know a lot about gardening, I know the tutorial and I know what you need to know to plant a tree, etc. I know how to care for plants and water them, etc. that's what i know i need I hope to help
