Sand dollars are radially symmetrical and have an internal skeleton but no backbone. Which phylum do sand dollars belong in?

A) chordates

B) echinoderms

C) arthropods

D) mollusks

Which of the following does NOT preserve biodiversity? a. captive breeding b. laws to protect species c. establishing wildlife preserves d. poaching endangered species

What nutrient makes up more than 60% of the human body mass? * ?

Currents that occur in Deep water are Wind driven Continental Corliois waves Thermohaline

Oil spills can cause substantial environmental damage. What are examples of the types of wildlife that are affected and the impacts that oil spills have on habitats? Why are oil spills difficult to manage and why do they have long-term impacts?

Which of the following steps are involved in scientific method

If rabbits gave birth to two young every two years, like bears, what would happen?

Genes are located on what and each gene controls a specific what

Refer to the introductory section of the chapter entitled "Earthbound Extraterrestrial? Or Just Another Microbe in the Mud?" Which of the following statements would be a feasiblehypothesis? A. If microbes do not have phosphorus, they will die. B.

Processes and packages proteins and lipids in the cell

The largest reservoir of nitrogen is found in which of the following? A. earthworms B. marine organisms C. atmosphere D. trees