The four main types of tissues of animals are: muscular, which is in ; nervous, which is in ; epithelial, which is in ; and connective, which is in the skin; cartilage; the brain; the heart cartilage; the skin; the heart; the brain the brain; the heart; cartilage; the skin the heart; the brain; the skin; cartilage

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

What substance acts to prevent sudden ph changes in bodily fluids?