Which use of iron is due to its chemical properties? producing colored sparks in fireworks
changing from liquid to gas at 2,862°C
conducting electricity and heat
changing from solid to liquid if heated to 1,538°C

Abnormal softening of a gland is known as

If an organ has six haploid chromosomes,how many chromosomes are present. 6 12

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.