Oswald Avery used different types of enzymes in his experiments to denature molecules including proteins and DNA. This way, he could determine which one was the “transforming principle”. What was he able to conclude?

a. DNase, which was used to degrade DNA, prevented transformation
b. neither protease or DNase was able to prevent transformation
c. enzymes that degraded the proteins, proteases, prevented transformation

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

every el niño cycle is different. every year.

yes it is weird but true

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.