The first truly living cells must have been prokaryotic in structure
Indicate whether the statement is true or false.
ANSWER: True
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Organs are made up of ________ type(s) of tissue.
A. Two or more B. Two C. One D. At least five
Discuss the function of hair cells as sensory receptors, and identify two different locations and/or
organs that utilize these receptors. What will be an ideal response?
Were there any eukaryotic cells on Earth 1.5 billion years ago?
A) Yes, they first appear in the fossil record around 3.5 billion years ago. B) Yes, they first appear in the fossil record around 2 billion years ago. C) No, they do not appear in the fossil record until around 1 million years ago. D) No, they do not appear in the fossil record until around 500 million years ago.
Diffusion _____
A) is very rapid over long distances B) requires an expenditure of energy by the cell C) is a passive process in which molecules move from a region of higher concentration to a region of lower concentration D) requires integral proteins in the cell membrane