vascular or non: hornworts
What will be an ideal response?
non
Environmental & Atmospheric Sciences
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Why are organisms in rocky intertidal zones sorted into horizontal bands??
A) ?Crashing waves remove weaker ones close to the water line. B) ?Some float and are carried upward at high tide. C) ?Some can better tolerate drying out between high tides. D) ?Some need to stay out of the water to breathe.
Environmental & Atmospheric Sciences
Most earthquakes occur at great depths.
Answer the following statement true (T) or false (F)
Environmental & Atmospheric Sciences
Which of the following is not a very long-lived, radioactive isotope?
A) Rb-87 B) K-40 C) C-14 D) U-238
Environmental & Atmospheric Sciences
If a rock started with 1,000 atoms of a parent but now contains 250 atoms, how many half lives have passed?
A. .25 half lives B. 2 half lives C. .5 half lives D. 1 half life E. There is no way to tell.
Environmental & Atmospheric Sciences