Recessive traits often seem to disappear because two recessive alleles are needed to produce the recessive phenotype. They can skip a generation and then reappear if an individual inherits two copies of the recessive gene. Mendel's experiments revealed that phenotypes could be hidden in one generation, only to reemerge in subsequent generations.
Recessive traits disappear because recessive alleles can hide out in heterozygotes, allowing them to persist in gene pools and natural selection can only see the phenotype, not the genotype. While harmful recessive alleles will be selected against and it's almost impossible for recessive alleles to completely disappear from a gene pool.
To learn more about recessive alleles, here
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Red blood cells pick up oxygen unhealed ( breathing in ) air and carry it through blood stream.
Answer:
A. The channel has a narrow pore that is only wide enough for a single water molecule to pass through.
Explanation:
Aquaporin water channels are integral membrane proteins present in plants and animals. Their main function is to transport water across the cell membrane responding to osmotic gradients.<em> It is suggested that steric factors (volume of the molecule) and electrostatic interactions are responsible for their selectivity for water, also the presence of an aromatic/arginine constriction retains the protons.</em>
Considering this information we can conclude that the correct answer is A. The channel has a narrow pore that is only wide enough for a single water molecule to pass through.
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Weather not climate, climate within a period of time referred to such winters,autumn but weather such as sunny,stormy..
