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Which type of cell came first in evolution the eukaryotic cell or the prokaryotic cell?
Ans) This is an interesting problem of biological evolution. The most accepted hypothesis asserts that the more easy cell, the prokaryotic cell, appeared early in evolution than the more difficult eukaryotic cell. The endosymbiotic hypothesis, for example, affirms that aerobic eukaryotic cells appeared from the mutualist ecological interaction among aerobic prokaryotes and primitive anaerobic eukaryotes.
The cells lining the inside of the cheek are frequently removed for making observations of basic cell structure. The cells are from stratified squamous epithelium. Explain a reason
F A TT Y ACIDS They are monocarboxylic organic acids (R.COOH) having a hydrocarbon chain of 4 - 30 carbon atoms. The polar carboxylic group is hydrophilic (Gk. hydro
Physiognomy and Pattern Physiognomy is the general appearance of vegetation as determined by the growth, form of dominant species. It may be considered a synthetic character
Which biological molecule contains the genetic information that controls cellular functioning
Etiology The causes of diarrhoea can be classified as follows: i) Infectious causes Viral : Rota virus, Norwalk and allied viruses, Enterovirus, Influenza virus,
what are the classfication and members af phylum protozoa
Honeybees are unusual in that male bees (drones) have only one copy of each gene, while female bees have two copies of their genes. That is because drones develop from eggs that ha
Define National Iodine Deficiency Disorder Control Programme (NIDDCP)? The prevalence of iodine deficiency disorders (IDD) are seen more among adolescent's young adults and sc
Specify the term in detail - Swim bladder. Found in bony fish, this gas-filled chamber is used to main neutral buoyancy. Oxygen in blood is added or removed as required. Swim b
Cryopreseravtion of gametes , embryos or DNA segments can be quite an effective and safe approach for breeds or strains whose populations are too small to be conserved by any other
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