3. seasonal changes on earth are primarily caused by
the
a) parallelism of the sun's axis as the sun revolves
around earth
b) changes in distance between earth and the sun
c) elliptical shape of earth's orbit around the sun
d) tilt of earth's axis as earth revolves around the
sun

Lucia is walking barefoot in her yard. she accidentally steps on a nail. how will her nervous system work to generate a reaction? arrange the eventschronologically.

If your blood becomes too concentrated with iona, what will happen to the red blood cells

Which of the following factors would not contribute to allopatric speciation? a) a population becomes geographically isolated from the parent population. b) the separated population is small, and genetic drift occurs. c) the isolated population is exposed to different selection pressures than the ancestral population. d) different mutations begin to distinguish the gene pools of the separated populations. e) gene flow between the two populations is extensive.