The steady state so vital to life is possible because Group of answer choices a. the cell continually takes up energy from the environment. b. all reactions are at equilibrium. c. the cell cannot convert energy from one form to another. all reactions are exothermic. d. all cells are autotrophic.

Which of the following is an example of this type of co-evolution

The term used to describe a disease-causing microorganism isa. virus.b. infection.c. pathogen.d. microbe.e. bacterium.

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2