Nina gets a new baby turtle from a friend, and is told to feed it worms. For the first few months, the turtle seemed to grow well. But as time passed, the turtle's shell appeared soft and fragile. Someone suggested that the turtle might not be getting enough calcium in its diet. If this is true for this turtle, dietary calcium is:. A. A limiting factor
B. An environmental condition
C. A habitat condition
D. A natural environmental stressor

The health, management and conservation of biodiversity, is a challenge facing ecosystems worldwide. the major factors that affect the health and function of the great barrier reef are climate change and pollution. which question investigates the effects of a biotic factor on the reef ecosystem?

You have a solution that contains phospholipid vesicles in a test tube. these vesicles have phospholipid bilayers, but do not contain any membrane transporters. you add a number of different molecules to the solution, and wait a period of time for them to equilibrate. if you could measure the concentration of each molecule, for which of the following would you expect to measure equal concentrations inside and outside of the vesicles? assume for this question that the overall osmolarity inside and outside the vesicles is the same (that is, there is no appreciable diffusion of water across the membrane). (select two answers) an amino acid with a hydrophobic side-chain a small non-polar molecule a negatively charged ion a small polar molecule a small lipid hormone

Which element is found in both dna and proteins