Morphological characteristics of birds
Write the main morphological characteristics of birds?
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Birds are animals which present aerodynamic bodies enclosed with feathers, anterior limbs converted into wings, pneumatic bones and horny (or corneous) beaks.
Explain what is meant by the gross primary production of the ecosystem? How the GPP does is related to the photosynthesis?
Explain briefly how AIDS is caused in the human beings?
Do bacteria cells encompass the nucleus?
Write down the brain region which is responsible for coordination and equilibrium of body?
Give a brief description of the term proto-cooperation?
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Explain whether the xylem and the phloem are made up of the living cells?
Which other phylum of animal kingdom present species with exoskeleton?
Describe briefly the main theory opposed to evolution?
Define briefly taenias? What are the diseases caused by them?
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