The result of this would greatly depend on the genotype of the parents. If either the father is homozygous Type A and the mother is homozygous Type B, then yes, a mix up has occurred because the probability of having an offspring with the blood type O would be zero. But if both of them are heterozygous, then having a child with type O will be possible with a 25% probability.
The resistance of a given object depends primarily on two factors: What material it is made of, and its shape. For a given material, the resistance is inversely proportional to the cross-sectional area; for example, a thick copper wire has lower resistance than an otherwise-identical thin copper wire. Also, for a given material, the resistance is proportional to the length; for example, a long copper wire has higher resistance than an otherwise-identical short copper wire. The resistance R and conductance G of a conductor of uniform cross section, therefore, can be computed as
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where is the length of the conductor, measured in metres [m], A is the cross-sectional area of the conductor measured in square metres [m²], σ (sigma) is the electrical conductivity measured in siemens per meter (S·m−1), and ρ (rho) is the electrical resistivity (also called specific electrical resistance) of the material, measured in ohm-metres (Ω·m). The resistivity and conductivity are proportionality constants, and therefore depend only on the material the wire is made of, not the geometry of the wire. Resistivity and conductivity are reciprocals: . Resistivity is a measure of the material's ability to oppose electric current.
This formula is not exact, as it assumes the current density is totally uniform in the conductor, which is not always true in practical situations. However, this formula still provides a good approximation for long thin conductors such as wires.
Another situation for which this formula is not exact is with alternating current (AC), because the skin effect inhibits current flow near the center of the conductor. For this reason, the geometrical cross-section is different from the effective cross-section in which current actually flows, so resistance is higher than expected. Similarly, if two conductors near each other carry AC current, their resistances increase due to the proximity effect. At commercial power frequency, these effects are significant for large conductors carrying large currents, such as busbars in an electrical substation,[3] or large power cables carrying more than a few hundred amperes.
D. The cell walls of plants are made of cellulose.
Answer:
Nematodes are referred to as "pseudocoelomates" since their coelom is not entirely lined with mesoderm ally cell - derived in most forms, and they are triploblastic.
<h2>What is a nematode?</h2>
Any unsegmented worm of the phylum Nematoda, having an elongated, cylindrical body; a roundworm
<h2>What are characteristics of the pseudocoelomate phylum?</h2>
<em>-bilateral symmetry, unsegmented, triploblastic</em>
<em>-body cavity a pseudocoel</em>
<em>-size: some microscopic, others a few meters in length</em>
<em>-body veriform</em>
<em>-complete gut (2 cavities)</em>
The structure of the body wall of pseudocoelomates explained:
<em>-muscles are longitudinal (no circular) beneath the hypodermis</em>
<em>-non-living cuticle secreted by the hypodermis</em>
<em>-composed of many layers of collagen</em>
<em>-useful for protection and containing high pressure of hydrostatic skeleton</em>
<em>-muscles contract and push against</em> fluid which causes movement
Coral reefs<span> are also being degraded by many other factors. The list of problems can seem endless: overfishing, fishing using cyanide and dynamite, pollution from sewage and agriculture, massive outbreaks of predatory starfish, invasive species, and sedimentation from poor land use practices</span>
