Define population density
Describe briefly the term population density?
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Population density is relation between the number of individuals of the population and area or volume they inhabit. For instance, in 2001 human population density of United States (in accordance with the World Bank) was 29,71 citizens per square kilometer and China had a population density of 135,41 humans for each square kilometer.
Write the name of the membrane which delimits the nucleus? To which constituent of the cell structure is that membrane contiguous?
How the mesoderm, the third germ layer of the triploblastic animals is formed?
What is PCR test? Briefly explain it. Answer: PCR test is the test to recognize the amino acid series in a polypeptide chain of a particular protein
Which chorioallantois membrane present within the embryonic development of the reptiles and birds? How does this membrane participate within the energetic metabolism of embryo?
Out of which structures is the nuclear membrane comprised of?
Characterize amphibians in accordance to the examples of representing beings, skin, basic morphology, nitrogen waste, respiration, circulation, thermal control and types of reproduction?
How does the substrate concentration influence the speed of enzymatic reactions?
When the air humidity is high does the plant transpiration increases or lowers?
State some of the respective constituents of gray matter and of white matter of the spinal cord?
Repeated external stimulus is more attention -attracting than a single time. Repetition increases our sensitivity and alertness to the stimulus. Thus, greater the frequency with which a sensory stimulus is presented, the greater the chances we select it for attention.
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