At what point did the climate began to fluctuate more severely ? (2 points )

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth

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

Can happen anywhere along the spine if the neural tube does not close all the way. the backbone that protects the spinal cord does not form and close as it should. this often results in damage to the spinal cord and nerves. a) cleft palate b) spina bifida c) encephalocele d) down's syndrome