A heterogeneous mixture composes of non- uniform components, so the concrete would be the answer, because you can tell the components from one another.
Answer:
Nucleic Acids
Explanation:
Nucleic acids are DNA and RNA and they are the molecules responsible for containing the genetic material of all living beings. Thus, DNA and RNA are the molecules responsible for establishing the variability and different characteristics between dog breeds, through the genetic information that each of them houses.
In this case, among the options given in the question above, we can confirm that if Allen has studied the genetic material of dogs to better understand why there are so many different breeds, he must have studied nucleic acids.
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Water in the ocean move differently depending of the win speed. In the ground, it only moves downward due to gravity pulling in the water while the soil absorbs the water. Water above ground only go one direction due to the slope of the mountain or riven.
Crossing over does not prevent homologous chromosomes from separating during meiosis, hence, the statement is false.
CROSSING OVER:
- Crossing over is the process whereby non-sister chromatids of homologous chromosomes exchange their genetic materials.
- Crossing over occurs specifically during the prophase I stage of meiosis I. Via this process, genetic diversity is likely to occur in the daughter cells.
- Crossing over only assures that genes of homologous chromosomes are recombined, it does not stop them from separating in the Anaphase stage.
- Therefore, crossing over does not prevent homologous chromosomes from separating during meiosis, hence, the statement is false.
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