Which statement is not part of the cell theory

a - cells may vary in size but have the same shape

b-all organisms are made of cells

c - all cells carry their own life activities

d - new cells arise only from other living cells

The protist kingdom is sometimes called the kingdom of misfits, why might this be a true statement

Changes in membrane potential serve as signals to cells within the body - and can often be a drug target in the treatment of many diseases. However, membrane potential is also the target of many toxins that disrupt various cellular processes.

suppose that the amino acids that make up an enzyme's active site are changed. how might this change affect the enzyme?

20. In an ovulate cone of a pine, meiosis occurs in the a antheridium. b. nucellus. C microspore mother cell. d megaspore mother cell.

Higher than normal temperatures in the Pacific Ocean causing weak trade winds and abnormal weather patterns result in a weather event called A) El Niño. B) a typhoon. C) a hurricane. D) the westerlies.

Uranium - 235 has a half-life of 700 million years. How much of the 12g sample of uranium would be left after 2100 million years? A. 1.5 g B. 6g C. 3 g D. 75 g

Which is closely linked to short-term memory, is like a place for doing mental jobs and allows children and adults to manipulate and assemble information when making decisions, solving problems, and comprehending written and spoken language. A.

1. How long does it take for the Moon to complete one rotation?

Classifications today are made on the basis of ... A. The flower of plants B. Ways that animals reproduce C. Likenesses D. Similarities and differences Urgent: taking a quiz!

How many new cells does your body produce every day?