The biodiversity of cultivated crops is currently under threat from industrial farming and climate change. The extinction of important crop plants could
cause mass starvation. Which
of the following is the best way for humans to
use a seed bank to help prevent this problem?
A. By storing a great variety of seeds in case one variety goes extinct
in the wild
B. By growing a large quantity of crops from seed and storing the
food they produce
C. By storing a large number of seeds that can be eaten when famine
occurs
D. By growing a large quantity of crops from seed and selling the
food they produce

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet