Which object has the same shape as a dna molecule?
a ) pyramidal house
b ) rectangular tv screen
c )spiral staircase
d )hexagonal stop sign

The table below shows the number of foot bones in some horse fossils.horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s

Phosgene is a chemical agent that is formed by decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. a. false b. true

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic