The negative impact of youth risk behavior considers the risks to youth health and the protective behaviors of health including smoking, drinking<span>, </span>drug use<span>, diet and physical activity. Depending upon one's social circumstance including the location of upbringing and access to education, the risk to health would increase, this could be affected by economic factors, with negative health impact increasing with the less access to resources. This directly impacts on the physical and mental well-being of an individual, with bad diet and lack of physical activity limiting a person's potential in the socioeconomic sphere and confidence and health.</span>
In order to calculate the distance between two alleles/genes that are found in the same chromosome, we need to know how often crossing-over happened (recombination frequency). We know from the text that white eyes were linked to miniature wings and that wild type eyes were linked to wild type wings, so any phenotype that's contrary to these parent combinations are a result of crossing-over. We know then that 230 flies + 240 flies were a result of such recombination. To calculate the recombination frequency we only need to divide these flies (total of recombinant flies) by the total of flies in the offspring and turn it into percentage.

=0.47
0.47*100%=47%
47 map units is the distance between the genes <span>for eye color and wing length.</span>
<span>Water covers around 70% of the Earth's surface and its high specific heat plays a very important role as it is able to absorb a lot of heat without a significant rise in the temperature. When temperatures decrease, the heat which is stored is released, restraining a rapid drop in temperature. The combined effect of these processes is a buffering of temperature on the Earth.</span>
The digestive system breaks down the food we eat while the circulatory system transports the tiny particles to each cell in the body.
Answer:
The correct answer is - true.
Explanation:
The scientific journal is are the journals that publish the recent scientific findings or scientific experiments that produce new and appropriate results regarding particular experiment or research/
To confirm an experiment, published finding must be tested repeatedly by different scientists and researchers and see if the results are same in particular conditions.
Thus, the correct answer is - true.