Radioactive isotopes are used in dating materials from the distant past. Which of the following statements about radioactive dating techniques is true?
A. It gives the general ages of rock strata. (±1 million years).
B. It gives exact ages of rock strata. (± 1 year).
C. It uses a technique in which the degree of radioactive decay is measured, the younger the rock the more radioactive decay.
D. It uses a technique in which the degree of radioactive decay is measured, the older the rock the more radioactive decay.
E. It does not work well with fossil remains that have not absorbed radiation.
D. It uses a technique in which the degree of radioactive decay is measured, the older the rock the more radioactive decay.
You might also like to view...
Which of the following hormones is NOT produced by the adrenal gland?
A. epinephrine B. cortisol C. prolactin D. aldosterone E. norepinephrine
A gardener in Canada wants to surprise his mother on her birthday and make her favorite hibiscus bush flower in May instead of at the end of June. The bush is growing in the greenhouse
Which of the following might make the hibiscus bush flower early? A) grafting leaves of a hibiscus that was exposed to long night B) grafting leaves of a hibiscus that was exposed to short night C) exposing flower buds of the hibiscus bush to long nights D) exposing flower buds of the hibiscus bush to short nights
The Mitchison and Kirschner ________ model of how microtubules transition between periods of growth and catastrophe proposes that ________ bound to ?-tubulin subunits at a microtubule plus end stabilizes the end and promotes growth,
but if the rate of hydrolysis to ________ exceeds the rate of tubulin addition, the end becomes unstable and loses subunits. Fill in the blank with correct word.
Coal deposits formed when forested areas were inundated with water and the __________ conditions
that resulted promoted incomplete decomposition of the vegetation into coal. a. aerobic b. anaerobic c. oxidizing d. desiccating e. saline