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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 major component of food is protein. The proteins ingested as part of our diet are not the same proteins required by the body, nor can large molecules be absorbed from the gut.
Salt Glands in Birds and Reptiles Marine reptiles for example, iguanas, estuarine sea turtles, crocodiles, sea snakes and marine birds like the marine teleosts do not produce
Q. How do schistosomes differentiate regarding sex separation? The Schistosomes are dioecious that is the species has separated sexes, female and male individuals.
Explain the Mortality and Survivorship Curves? Mortality : Just as a population has a birth rate, so does it have a death rate. A populations rate of death, or the number of
What resources are competed for by (a) animals, (b) plants? (a) Animals compete for food, mates and shelter. (b) Plants compete for light, water and minerals.
Q. List the tissues of pancreas? The pancreas is made up of two types of tissue: The exocrine tissue secretes digestive enzymes. These enzymes are secreted into a network of
what is the excretory organ of a lizard?
What spices is protozoa
Q. Define Myocardial infraction and stress testing? Prediction of disease is one of the primary functions of stress testing. We would like to be able to predict in each patient
significance of gastrulation
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