Scientists have been genetically modifying food crops since the mid 1990's. as a result, scientists have been able to produce crops that are more disease resistant. what could be seen as a risk associated with using genetically modified crops? a) reduction in nutritional value of the food crop b) plants can be "tailor made" for the desired trait c) crops may cause an increase of allergic reactions in humans d) crop production would be increased due to greater disease resistance

The correct answer would be C)crops may cause an increase of allergic reactions in humans.

Transgenic crops are the crops in which the genome is modified through genetic engineering techniques. It usually involves the introduction of a gene from different species which provide desired traits such as disease resistance, high nutrition value et cetera.

Due to genetic modification, the crops may act cause disease or allergic reactions in humans.  

Our body may produce immunogenic or allergic reaction towards the genetically modified crops.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.

density and pressure