Angela tries to pick up a copper penny using a bar magnet, but the penny does not move. then, she tries to pick up an iron nail using the bar magnet, and the nail lifts up toward the magnet. her teacher tells her that the magnet lifts the iron nail because it is a ferromagnetic material. which of the following best describes a ferromagnetic material?

a material made of non-metals that produce magnetic fields

a material that easily conducts electricity

a material with naturally strong magnetic properties

a material that produces its own magnetic field

This is due ! matching pairs of chromosomes from parents are called a. homologous chromosomes b. heterozygous chromosomes c. herterogenes d. homologous bands

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

Which is an example of a vestigial structure? a. tail of a monkey b. fin of a fish c. flower of a plant d. tailbone of a human