Vessel elements and tracheids develop and become specialized hollow cells via the process of programmed cell death,
also called apoptosis. Indicate whether the statement is true or false.
True
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Which molecule comprises the largest proportion of the carbon reservoir in the ocean?
a. carbon dioxide b. carbonic acid c. bicarbonate ion d. carbonate ion
Distinguish between stromatolites and biosignatures
What will be an ideal response?
Both bacteria and fungi digest food by
A) ingesting previously decomposed molecules. B) forming food vacuoles through phagocytosis. C) secreting enzymes and then absorbing the smaller molecules. D) photosynthesis. E) eating only small organisms that they can engulf.
Peter and Rosemary Grant study natural selection in finches on the Galápagos Islands. They have hypothesized that dry condition produce larger seeds and may result in larger beaks in succeeding generations of finches. The figure below shows their data from 1976 and 1978. The y-axis is the number of birds measured and the x-axis is the beak depth. Do their data support their hypothesis and why? 
A. No; because in 1976, before the drought, the largest beak depth was still 11.3mm. B. Yes; because the average beak depth of birds in the population increased from 8.8mm in 1976 to 9.8mm in 1978. C. No; more data would be necessary to show a support of their hypothesis. D. Yes; because there were more birds measured in 1978 after the drought, therefore they must have been able to get food and reproduce. E. No; because even though more birds were measured in 1978, the beak size of the upper range was smaller.