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Q. How is the finding of ribosomes inside mitochondria and chloroplasts explained?
It is a strong hypothesis that chloroplasts and mitochondria were prokaryotes that associated to primitive eukaryotic cells under mutualism gaining protection and offering energy. This explains why within those organelles there are protein and DNA synthesis machinery including ribosomes. This hypothesis is called as the endosymbiotic hypothesis on the origin of chloroplasts and mitochondria.
The main objectives of study of ecology are: (i) To study the distribution of biota local and geographical level. (ii) To study the interrelationship
Describe Alternation of Generations? Alternation of Generations : In meiosis, four haploid daughter cells are formed from one diploid mother cell. The life cycles of sexuall
Indifferences in ionic composition Answer A. across membranes can be created through the action of ATP driven pumps as long as number of negative and positive ions on remain equal
Demonstration of Diversity of Plant and Animal - Taxonomy A third objective is the demonstration of tremendous diversity of the plant and animal world and its relation to man's
how many hair are there on head
Q. What is visual accommodation? Visual accommodation is the phenomenon of varying the curvature of the crystalline lens to make possible the difference of its refractivity to
Ac ute heart failure The acute heart failure is characterized by sudden loss of consciousness and falling with or without convulsions. The mucous membranes become pale followe
Clinical symptoms of typhoid are: 1. Graded fever which follows an upward ladder pattern. 2. Abdominal pain, cramps and diarrhoea. 3. Anorexia and vomiting. 4. In
WHAT IS THE FUNCTION OF CELL COAT
Fertilizers and Fertilizer Management Fertilizers, in a broad sense, include all materials that are added to soils to supply certain elements essential to the growth of plants
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