Expansion amounts for 50 cm of each of the solids:

brass alloy: 0.11 cm
aluminum: 0.07 cm
iron: 0.12 cm
steel alloy: 0.04 cm

Each strip of metal was the same thickness and was heated to 100°c.

Based just on the data, which conclusion can be drawn?

a) metals expand upon heating.
b) alloys expand less upon heating than elemental metals.
c) alloys expand more upon heating than elemental metals.
d) the rate of expansion of metals is directly proportional to the temperature to which it is heated.

Although the two theories differ on the evolutionary path of dinosaurs, they agree that

Which of the following sex and generation combinations directly produces the pollen tube of angiosperms? a) male gametophyteb) female gametophytec) male sporophyted) female sporophyte

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