________ is the process by which internal and external structures of cells and organisms are preserved and maintained in position.
Fill in the blank(s) with the appropriate word(s).
Fixation
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Use the following study to answer the following question(s): A researcher applies varying amounts of fertilizer (0, 2, 4, 8, 10 units) to 50 potted tomato plants. All other variables that may affect the outcome (watering, temperature, sunlight, plant size, etc.) are kept the same from pot to pot. At the end of the growing season, the tomatoes grown on each plant are weighed to determine which fertilizer level produced the largest tomato yield.Is the study presented above a controlled experiment?
A. Yes, because many pots were used. B. No, because the experiment was done only once. C. No, because several different amounts of fertilizers were used, not just one amount. D. Yes, because only the amount of fertilizer was changed, everything else was kept the same.
What character state distinguishes Cnidarians from Bilaterians in the phylogenetic tree in Figure 35.2?
A. presence or absence of ganglia B. presence or absence of sensory neurons C. presence or absence of interneurons D. presence or absence of motor neurons
Describe the process of mRNA splicing
What will be an ideal response?
Genes that are physically close to one another on a chromosome can be influenced by _______, causing phenotype traits to appear together.
a. epistasis b. recombination c. linkage d. codominance