The action of compressing or being compressed.
the reduction in volume (causing an increase in pressure) of the fuel mixture in an internal combustion engine before ignition.
Answer:
the genotype is responsible for a particular trait or all of the traits
Explanation:
To test the Porosity of the hair, one should select a small section of hair at the crown, hold it at the root and the tip, and slide the hair down two to three times slowly. The porosity of the hair is the ability to absorb moisture and may be low, normal or high. A porosity test indicates the category of an individuals hair. It is important since one is able to maintain hair's health than merely just knowing the hair type.
Answer: (B) Pre-zygotic; post-zygotic.
Explanation:
Prezygotic isolation occurs before fertilization of eggs. It occurs between the two sex gametes and deter sexual reproduction between different species.
However, individuals are considered to be diverge on the phylogeny tree and different species, when they cannot reproduce.
Mechanisms of prezygotic isolation include habitat isolation, gamete isolation, mechanical isolation, behavioral isolation, and mating seasons.
Whereas, postzygotic isolation prevents the formation of fertile offspring. This phenomenon leads to production of an hybrid offspring from different species and this is a form of speciation in nature.
Mechanisms of postzygotic isolation include hybrid inviability, hybrid breakdown, and hybrid sterility.
