Component of cell walls, involved in maintenance of membrane structure.
Choose the letter of the best match:
A. nitrogen
B. calcium
C. potassium
D. phosphorus
E. magnesium
B. calcium
Calcium is an important component of cell walls and the maintenance of membrane structure and permeability.
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Your brother has just purchased a new plastic model airplane. He places all the parts on the table in approximately the positions in which they will be located when the model is complete. His actions are analogous to which process in development?
A) morphogenesis B) determination C) induction D) differentiation E) pattern formation
If all of the restriction fragments in a DNA digest were of very low molecular weight, then all of the fragments on the electrophoretic gel will be closest to the positive pole and furthest from the negative pole.
Answer the following statement true (T) or false (F)
A heritability value of 0.997 indicates which of the following?
A. The majority of the phenotypic variation has a genetic basis B. The majority of the phenotypic variation has an environmental basis C. The trait is polygenic D. There is a significant difference between the two strains
Natural selection acting on a population may NOT favor
a. individuals at the left end of the range of variation. b. individuals at the right end of the range. c. extreme individuals at both ends of the range. d. the intermediate individuals within the range. e. obligate asexually reproducing organisms.