Aresearcher is concerned about a population of bavarian pine voles, a type of endangered rodent. the researcher wants to estimate the genetic diversity of the population by collecting dna samples from some of the pine voles. which sampling method should he use?

a. netting

b. quadrat sampling

c. tagging and wildlife tracking

d. point counts

Awic dietitian is meeting with a client who has an infant and a young child. the mother says that the young child is a very picky eater and will only eat crackers and juice. the health worker notices that the child's hair is brittle, his nails tear easily, and the skin inside his lower eyelids is very pale. these are all signs of iron deficiency.

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z

Cells destroy body cells infected by a virus or bacteria.