HELP PLEASE!! What do scientists think happens in the core to produce the Earth's magnetic field? 1. The outer liquid core becomes magnetized by the rapid spin of the solid inner core.
2. The liquid iron and nickel outer core's motion in relation to the metallic solid inner core becomes a geodynamo.
3. The solid inner core of iron and nickel act as a large magnet.
4. The liquid iron and nickel inner core's motion in relation to the mantle becomes a geodynamo producing a magnetic field.

Which class of organic compounds makes up the channels and pumps that move materials from one side of the cell membrane to the other? a.) carbohydrates b.) lipids c.) proteins d.) nucleic acids

Dna has unique properties that allow it to accurately retain genetic information, even after multiple rounds of replication. one aspect of dna that allows it to accurately store genetic information is the base pairing from chargaff\'s first rule of the four nucleotide bases. if the c content of a dna molecule is 22%, what are the percentages of the remaining bases?

Fruit bats in central america eat bananas and other fruits. banana plants rely on bats for pollination. what would be the most likely consequence on the banana crop if fruit bats were eliminated from the area? the banana crop would increase because bats would stop eating the crops. the banana crop would decrease because bats would no longer pollinate the crops. the banana crop would remain constant because bees would replace the bats. the banana crop would remain constant because the plants would adapt using asexual reproduction.