There is a species of beetle that has two different color phases. Some have dark, purplish shells with green spots on them; others (same species) have greenish shells with purple spots on them, and there are other varieties that are somewhere in between. The beetles feed on the garden plants and the birds in the area feed on the beetles. When Mr. Jones bought his 200 acre farm, most of his farm was overgrown with an invasive vine that had purple stems and leaves. As he set to work removing these vines so he could farm the land he found many of these beetles on his land. Most of them were the purple color phase, with the occasional green beetle here and there. After several years and lots of hard work he had removed all of the purple vines and replaced them with green soybeans and corn plants. By this time, when he was working in his fields, he noticed that he still saw lots of the beetles, but very few of them were purple. Instead, most of them were the green color phase.

this is just evolution like the birds on the Galapagos islands also I don't see the question

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

picture a world where computers are building made-to-order personalized robotic arms and synthetic organs, drones are circulating above mars! due to the rapid growth of technology, the future has never been more unpredictable, and it presents a huge challenge in education: we are teaching students how to work in a future that we have never been unsure of. it is widely predicted that in eight years’ time, there will be more jobs in the fields of science, mathematics, technology and engineering than in any other discipline. and, as the technology continues to develop, it will soon become clear that addressing social problems will involve more innovative thinking, and analytical and technical knowledge than ever before. undeniably, there are no subjects that encourage innovative and creative thinking, deep thought, problem solving and independence more than the stem subjects. while it is widely commented on that there is a need to reimagine the ways stem subjects are taught in schools by embracing a more interactive and innovative approach to appeal to more students, it should come as no surprise that some of the most reputable educational organizations in the world are already implementing changes to embrace stem. harvard, for example, announced in 2014 that they were increasing their computer science faculty by over 50% and has since introduced computer science as a core subject for all freshmen. the urgency of supporting stem subjects at a young age is becoming more relevant than ever, as adopting a keen interest in the curricula needs to happen early. however, beyond the age issue is one of gender.

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