Internal and external gills
Explain the challenges and advantages of having internal gills over external gills for gas exchange? (2 points)
Are mollusk metameric living beings? Completely analyzing this aspect could it be said that molluscs are evolutionarily proximal to the nematodes or to the annelids?
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Define null cells. Answer: The lymphocytes which are devoid of markers for T and B-cells are termed as null cells.
A 35-year old woman has been chosen for the hysteroscopy. What are the signs for hysteroscopy in a woman of this age?
Define the term anoxia? Briefly explain it.
Explain the formation of yolk sac? Specify the function of yolk sac?
Describe briefly the life cycle of a tapeworm?
Why it is said that throughout photosynthesis carbon-dioxide is enriched to make glucose?
Explain, how does the swim bladder of fishes work permitting the fishes in order to control their depth under the water?
Is mammalian embryonic development indirect or direct?
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