Fossils are aged by a process that examines the ________ of known radioactive elements
Fill in the blank(s) with correct word
ratio
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Which number identifies a region near the promoter that increases the rate of transcription?
a. 2 b. 3 c. 4 d. 5 e. 6
Which of the following is correct?
a. All living things are composed of multiple cells. b. All cells arise from existing cells. c. Organelles are the basic unit of life. d. Living organisms do not have to be composed of cells.
When a signal arrives at the cell, it gets transduced. What is meant by the term signal transduction?
A. The signal is inactivated, so that cell stops responding. B. Signal transduction is how the receptor binds to the signal. C. The signal is transmitted inside the cell in another form. D. The mechanisms by which the cell responds to the signal are ducible.
The egg is propelled down the uterine tube by
A. suction from the uterine contractions. B. simply drifting on the prevailing current of body fluids. C. flagella. D. uterine tube cilia and tubular muscle contractions.