Cyclins are a family of proteins that control the progression of cells through the cell cycle by activating cyclin-dependent kinase (Cdk) enzymes.
So A. Is correct
Answer:
Most human cells are diploid, and only the gametes (i.e., the sperm and egg cells) are haploid. Haploid cells contain half the number of chromosomes as diploid cells. A human diploid cell contains a total of 46 chromosomes (2n = 46), so a haploid cell will contain 23 chromosomes (n = 23).
Answer:
threatened is the term when speacies have fewer members in the present than they did in the past.
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<span> D. The bases are both long.
Hope this helps!</span>
An autotroph is a living organism that produces complex compounds such as carbohydrates, fats and proteins. They are producers in a food chain, in contrast to heterotrophs who are consumers.