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

All cells within organism will have the same of chromosomes except the gamete true or false

What are the issues with the biological species concept?

Explain how a plant can cause a rock to weather

The resources of service makes up of the average Americans ecological footprint

What makes you different than any other human?

ATP molecules are needed to start A). The Krebs cycle B). Glycolysis C). The electron transport chain D). None of the above

The notochord is responsible for which function in an embryo? A. processing wastes B. structural support C. respiration D. processing nerve signals

What is the recommended range of weight gain, in lbs, during pregnancy for a normal-weight woman? ?

How can researchers distinguish exons from introns in a segment of DNA? a. The sequence of exons complements mRNA molecules in the cell. b. Only exons contain three-base sequences that can code for amino acids. c. Primers won't bind to introns. d.

Factors for which organisms are competing in a given habitat