How often should you change the water in a 1 gallon betta tank?

Can you tell the size of a woman's coxal bone by observation?

Genetically modified organisms can include icecream. true or false

15 min. leftread about what these classmates had for lunch and identify the missing terms. mark eats whole-wheat pasta mixed with vegetables for lunch. for dessert, he has a cherry popsicle. the whole-wheat pasta and fresh vegetables will be digested (faster than, slower than, at the same rate as) the popsicle.