Answer:
The involvement of more than two genes.
Explanation:
The polygenic characteristics have many phenotypes because more than two genes governs the phenotype of individual organism. The single gene contains a pair of alleles that codes for two phenotype and two genes will code for 4 phenotype. Thus, more than two genes for example, three genes will have six phenotypes.
The skin color and height are polygenic characterstics in humans.
Answer:
Higher pressure in glomerular capillaries than in the surrounding Bowman's capsule.
Explanation:
The renal corpuscle is composed of the capillary glomerulus and the Bowman's capsule that covers it, there is a space inside the capsule, Bowman's space, where the filtered liquid from the glomerulus passes. The glomerular pressure must be higher than in the surrounding Bowman's capsule, so in that way it forces the filtration and tends to expel fluid from the glomeruli, allowing the passage of water, small molecules of solute and ions.
<u>Answer:</u>
Gravitational redshift, changes in a planet’s orbital path, gravitational lensing provides the concrete evidence for the general theory of relativity.
<u>Explanation:</u>
- Due to the slowing of time in very 'strong gravitational field' the gravitational redshift occurs.
- The low frequency of the light occurs in the red part when we observe the electromagnetic spectrum.
- The appearance of light is seen slightly shifted to the 'red wavelength'.
- The matter in the galaxies that bends the light from a source at a distance reaching the observer is also a evidence which is termed as gravitational lensing.
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