What organelle controls a cell's activities? nucleus mitochondria centriole

The adult spinal cord ends between the level l1 and l2 of the vertebral column. True or False

What is the 2 type of variable are being used in a controlled experiment?

6. Are there any bacteria made of more than one cell?

The movement of air into and out of the lungs is called

Lyell's theory is best known to day as A) the law of superposition. B) uniformitarianism. C) catastrophism. D) intrusion.

Which structure is an example of a hinge joint?

Shivering and sweating are two techniques that mammals use to a) adapt to the temperature b) develop a rise in body temperature C) maintain homeostasis d) use excess energy

During the process of cellular respiration, energy is released from (1) carbon dioxide (3) water molecules (2) oxygen atoms (4) chemical bonds

Protist get energy by

10. What is a genotype? A an organism's combination of genes for a trait B an organism's appearance as a result of its genes C the ratio of dominant to recessive genes in an individual D the collection of dominant genes in an organism