Answer: Convergent boundaries occur where the Earth's tectonic plates collide or move toward one another.
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Genes and environmental forces shape development, thereby many human characteristics are EPIGENETIC. This field (epigenetics) is the intersection between genes and the environment.
Epigenetics refers to the study of gene expression patterns that do not involve a change in the nucleotide (DNA) sequence.
Epigenetic mechanisms include DNA methylation, histone modifications and non-coding regulatory RNA pathways.
These epigenetic mechanisms work together with environmental factors to shape the development.
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Answer:
C. Vector
Explanation:
Plague or bubonic plague is also called as black death. The pathogen responsible for this disease is <em>Yersinia pestis</em>. It is primarily a disease of rodents but can accidentally affect man. It spreads from rat to rat through rat flea (Xenopsylla) i.e flea act as the vector which transmits disease from one rat to another. But when the infected rats die, the fleas leave their body and can even bite man and inject the plague germs into his body. The symptoms of bubonic plague include high fever and a bubo or lump in the groin region or in the armpit region. Red patches appear on skin which turn black and ultimately leads to death called black death.
Crosscutting concepts have application across all domains of science. As such, they are a way of linking the different domains of science. They include patterns; cause and effect; scale, proportion, and quantity; systems and system models; energy and matter; structure and function; and stability and change.
