There are about 50,000 different trilobites we know today. Discuss their characteristics that made them an abundant fossil of the Cambrian period.

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

In a leaf, dermal tissue a) stores food b) stores carbon dioxide c) releases oxygen into the air d) transports water from the roots