An investigator transferred 100 μl of a 0.2% bpb solution to 900 μl of water and measures an absorbance of 0.3 at 590 nm. she wants to prepare another 1 ml sample with the same absorbance using a 0.5% bpb solution. how should she prepare thiskample? 1. add 75 μしof the bpb solution to 925 μl water. 2. add 250 μしof the bpb solution to 750 μl water. 3. add 25 μしof the bpb solution to 975 μl water. 4. add 40 μしof the bpb solution to 960 μl water.

Indicate whether the following statements about the biases in the fossil record are true or false. a) inland species are more likely to be preserved than marine species b) organisms with hard body parts are more likely to be preserved than are those composed soft tissues. c) species that existed over a larger area are more likely to be preserved than species existing over a smaller area. d) organisms that lived very long ago are more likely to be found as fossils than organisms that lived relatively recently e) the fossils of larger organisms are more likely to be found than the fossils of smaller organisms

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?