Science--a lack of which of the following creates a dead zone? select one: a. carbon b. nitrogen c. phosphorus d. oxygen

answer; i believe its (ovulation);

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive

whats the drop down answers ?

explanation: