Organisms develop a normal morphology because cells can receive and interpret
A. extracellular positional information.
B. intracellular positional information.
C. both extracellular and intracellular positional information.
D. signals from other developing organisms.
E. all of the signals described in the choices.
C. both extracellular and intracellular positional information.
You might also like to view...
A vaccine for the common cold is not feasible because
A. the surface antigens of rhinovirus mutate frequently. B. the cause is unknown. C. the rhinovirus cannot be grown in sufficient quantities. D. there are more than 100 types of rhinovirus.
Many species of flowering plants reproduce asexually by __________. Fill in the blank(s) with the appropriate word(s)
Penicillin is a competitive inhibitor produced by a fungus in order to kill invading bacteria. It does this by mimicking the substrate required by the bacterium to build and repair its cell wall
Describe how mimicking the substrate would result in the death of the bacterium.
Two bacterial strains have the same genes for metabolizing a carbohydrate, but one is wild-type for a regulatory inducer while the other does not produce the inducer. Which of the following statements is CORRECT with regard to the metabolism of the
bacteria? A) The two bacterial strains have the same phenotype. B) The two bacterial strains have different phenotypes. C) The genotypes and phenotypes of the two bacterial strains are the same. D) The two bacterial strains have the same phenotype but have different genotypes. E) The answer cannot be determined from the information provided.