Why is it difficult for scientists to find fossils from the precambrian period?
a)there are no rocks left on earth that exist from this period.
b)life did not exist during this period.
c)the life that existed had soft bodies, which rarely left behind fossils.
d)scientists cannot date rocks before the precambrian period.

Chinese privet is a plant that is native to china. over 150 years ago, chinese privet was introduced to the united states as a fast-growing shrub that serves as an excellent privacy hedge. with no natural herbivore, chinese privet quickly established itself and spread in natural areas throughout the southeast and eastern seaboard of the united states. its dominance in these areas has jeopardized the survival of native plant species. chinese privet provides evidence that introducing non-native organisms can cause environmental damage integrated pest management strategies will not decrease chinese privet populations american gardeners can easily control the spread of chinese privet non-native plant species have type i survivorship curves

Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with "basking lights" which act as an artificial sun. describe how the three methods of thermal energy transfer may take place within the iguana's enclosure.

Explain why ecosystem diversity results in species diversity in a healthy biosphere