A marine scientist collected data regarding the height of the tide at clearwater beach over the course of a week. The data is shown below. She concludes the tide will always be lowest at night. Is this correct? Day Low Tide High Tide

18-Jan 1:10 AM 6:39 PM
19-Jan 2:11 AM 7:40 PM
20-Jan 3:10 AM 8:37 PM
21-Jan 4:01 AM 9:28 PM
22-Jan 4:44 AM 10:14 PM
23-Jan 5:24 AM 10:55 PM
25-Jan 6:01 AM 11:33 PM

a. Yes: low tide is consistent and will always be lowest after 6pm.
b. Yes; the tide is always lowest between 12 am and 6 am and will continue to follow the pattern.
c. No; low tide advances by 40 to 60 minutes each day.
d. No; the height of the tide is unpredictable from day to day.

Which list is in order from simplest to most complex? a bacteria - virus - plant - protist b protist - bacteria - virus - plant c virus - bacteria - plant - protist d virus - bacteria - protist - plant

Rease is an enzyme used by plants to break down urea (a nitrogen-containing compound) into carbon dioxide and ammonia. urease urea > > > carbon dioxide and ammonia ammonia is broken down by plants into a nitrogen source plants need to grow. thus, plants could not use urea as a nitrogen source unless it was first converted to ammonia. in soybean plants there are two different kinds of urease, one produced in the seeds and the other produced in the leaves of the plant. three types of soybean plants were used in a set of experiments: normal soybeans and two mutant strains, one lacking the urease in the seeds only (strain 1) and one lacking urease in the leaves only (strain 2). experiment 1 separate areas in a field were planted with normal, strain 1, and strain 2 soybeans. all types of soybeans appeared to grow, flower, and produce seeds equally well. there were no externally detectable differences among the strains. experiment 2 small pieces of plant leaves of equal weight were obtained from each type of soybean plant and separately placed on media in culture dishes. tissue growing in this way will become an unorganized clump of cells referred to as callus. to provide a controlled nitrogen source, half the tissue samples of each type were placed on media containing urea, and the other half of the samples were placed on media containing ammonia. after 30 days, the weight gain for each of the callus samples was determined. results are shown in the table below.

Which feature would you expect to find in a population in which sexual selection depends on male competition?