D?!? Let me know if you get it right
Cyclins and cyclin-dependent kinases are responsible for the progress of the cell through the various checkpoints.
Answer: About 24 chromosomes
Explanation: A male grasshopper has 23 chromosomes in each somatic cell and a female has 24 chromosomes in each somatic cell.
Biological soil crusts<span> are communities of living organisms on the </span>soil<span> surface in arid and semi-arid ecosystems. They are found throughout the world with varying species composition and cover depending on topography, </span>soil<span> characteristics, climate, plant community, microhabitats, and disturbance regimes.</span>
