Mary is testing two stain removers to see which one works best to remove grease from a towel. She put the same amount and type of grease on each of 10 towels. She then treated
each towel with the same amount of stain remover. She used each type of stain remover on 5
towels. What is the independent variable in Mary's investigation?
the amount of grease
the number of towels
the type of stain remover
the amount of stain remover

Which of the following is most important in making the typical seed more resistant to adverse conditions than the typical spore? a) a different type of sporopollenin b) an internal reservoir of liquid water c) integument(s) d) ability to be dispersed e) waxy cuticle

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

In the united states there are strict fishing seasons and limits, but not all countries enforce similar laws. in bangladesh there are few if any fishing restrictions. what might be the reason for less restrictions in smaller countries like bangladesh? a) the united states is the only country worried about overfishing. b) the united states wants to limit the supply of fish to increase the price. c) bangladesh and smaller countries have an unlimited supply of fish in their coastal waters. d) small countries, such as bangladesh, are practicing subsistence fishing, taking only the fish needed to survive.