Concepts of molecules-atoms-cells
Write down the logical order in which the concepts of molecules, atoms, cells... up to biosphere are allocated?
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Atoms form molecules which form cells which form tissues which form organs which form systems. Systems, in their turn, constitute individuals which form populations which compound (biological) communities which form biotic components of the ecosystems. All ecosystems of earth form biosphere.
What do you mean by catalysts?
Give a brief explanation of typical vegetation and the typical fauna of tropical forests.
Write down other significant human diseases caused by the protozoans?
Is tubular-dorsal nervous system of chordates related to lateral or radial symmetry? How does that elucidate the complexity level of nervous system reached by the vertebrate evolutionary branch?
Name the tissues which form the skin in vertebrates?
Describe briefly the term vascular bundles? How does the configuration of vascular bundles in the stem distinguish monocots from dicots?
Describe the event which marks the start of the menstrual cycle? Also give details of blood concentration of FSH, estrogen and LH and progesterone within this stage of cycle?
Write down the name of biological molecule which contains the genetic information and which is transmitted hereditarily and controls cellular functioning?
Write down the differentiation between the concepts of food web and food chain.
What do you mean by the excitation threshold of a neuron? How this threshold is related to the “all-or-nothing” rule of neural transmission?
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