1. dna replication produces two identical dna molecules, called sister chromatid(s), which separate during mitosis.2. after chromosomes condense, the centromere(s) is the region where the identical dna molecules are most tightly attached to each other.3. during mitosis, microtubules attach to chromosomes at the .4. in dividing cells, most of the cell's growth occurs during .5. the is a cell structure consisting of microtubules, which forms during early mitosis and plays a role in cell division.6. during interphase, most of the nucleus is filled with a complex of dna and protein in a dispersed form called .7. in most eukaryotes, division of the nucleus is followed by , when the rest of the cell divides.8. the are the organizing centers for microtubules involved in separating chromosomes during mitosis.

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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one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.