Ferns do not have cones or fruit, instead they have . A)Spores
B)Seeds
C)Pollen
D)Zygotes

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

Which short-term environmental change is most likely to lead to ground shifting, landslides, and the collapse of buildings or roads? forest fires flooding earthquakes