Which factor is a density-dependent limiting factor on the population of a species?

Which of the following statements most accurately describes convergent evolution? the process in which two similar species evolve separately from each other and share similar characteristics the process in which a single species evolves into two or more new species the process in which two entirely different species evolve in response to each other the process in which two different species evolve separately from each other but still share similar characteristics

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?