Which statement best describes how materials move naturally? a. materials move from an area of high concentration to an area of lower concentration, or down the concentration gradient. b. materials move from an area of low concentration to an area of higher concentration, or up the concentration gradient. c. water is the only substance that can move down a concentration gradient. d. materials require energy to move up & a down their concentration gradients.

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

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .