Cyclin-dependent kinase…
A. is an enzyme.
B. works with cyclins to determine progression past cell checkpoints.
C. both of these
D. none of these

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

Consider the skeleton. which skeletal system is represented by the shaded portion of the skeleton? spongy skeleton compact skeleton axial skeleton appendicular skeleton

When a person is exercising the body needs to deliver increased amounts of oxygen to the muscles which component of blood ensures that the muscles will receive it