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What are blood stem cells?
Stem cells are undifferentiated cells able to distinguish into other types of specialized cells.
The stem cells of the bone marrow create the differentiated blood cells. According to stimulus from specific growth factors the stem cells are turned into red blood cells, leukocytes and megakaryocytes (cells that form platelets). Research shows that stem cells of the bone marrow can also distinguish into muscle, nervous and hepatic cells.
Blastocyst is the developmental stage of fertilized ovum by the time it is prepared to implant; formed from morula and comprises of an internal cavity, an inner cell mass, and an
Q. What are the three major types of passive transport? The three main types of passive transport are simple osmosis, diffusion and facilitated diffusion.
Explain Metameric in detail. A body plan which consists of a series of identical units, metameres, repeated down longitudinal axis of the animal. Every metamere contains identi
Q What are the kinds of digestion and of digestive system of platyhelminthes? Flatworms have incomplete digestive systems and they present intracellular and extracellular compl
Metaphase This is a period of short duration, the chromosomes are at the stage of their maximum condensation and , hence more clearly visible ,Upon each side of the
ELECTRON TRANSPORT CHAIN All processes require energy. In living cells, we constantly use energy for a number of biochemical reactions e.g. muscular movements, synthesis of ne
briefly explain the following feeding mechanisms in holozoic animals a) filter feeding b) fluid feeding c)deposit feeding
Equine influenza Equine influenza is a highly contagious, epizootic disease, which affects equines of all age groups and is caused by influenza virus A/equine virus of family
Q Which are the organs and characteristics of the digestive system of earthworms related to the kind of diet of these animals? Small organisms ingested together with soil parti
Q. What are some examples of migratory animals? Instance of the migratory animals are southern right whales from Antarctica, that procreate on the Brazilian coast; the migrator
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