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What is an argument that shows that the emergence of photosynthetic beings was crucial for life to reach the marine surface and later the dry land?
The Ultraviolet radiation from the sun was not disallowed to reach the surface of the primitive earth. Consequently the development of life on dry land or even near the aquatic surface was impracticable. Most likely the first living beings lived submerged in deep water to avoid destruction by solar radiation. Merely after the appearance of photosynthetic beings and the later filling of the atmosphere with oxygen released by them the formation of the atmospheric ozone layer that filters ultraviolet radiation was possible.
What are the two main classes into which fishes are divided? Fishes are separated into two main classes: chondrichthyes, fishes with cartilaginous skeletons (sharks, rays, dog-
A fatty acid having of a hydrocarbon chain and a terminal carboxylic acid group that is shown in the figure. Most fatty acids are in biology have an even number of carbo
1. Briefly explain the dynamics in enzyme reaction mechanism with potential energy surface diagram. 2. How to find the rate constant of any enzymetic reaction? 3. Derivation
Q. Association of Fibrinogen With Cardiovascular Risk Factors? Ans. Fibrinogen, a large glycoprotein made mostly in the liver, is a clotting factor that activates thrombin
What is Portal and Rental Circulation ? The body has other circulation systems that do not return blood directly to the heart. For instance, the blood that drains from the abdo
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Q. How does the vegetal stratification of an ecosystem influence the biological diversity? The vegetal stratification of the ecosystem like the strata of the Amazon Rainforest,
Why is rubella during gestation a threat to the fetus? If occurring during gestation rubella is a dangerous disease due to the virus crosses the placenta and contaminates the f
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What are food hydrocolloids? Food hydrocolloids are hydrophilic polymers of vegetable, animal, microbial or synthetic origin that generally contain many hydroxyl groups and ma
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