Cilia and flagella are most similar in ____.
A. length
B. the kinds of cells that have them
C. the number that cells usually have
D. their internal composition and structure
E. their location along the cell's periphery
Answer: D
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Repeated sequences within eukaryotic genomes may be represented as long repeated sequences next to each other, and are called ___________ repeats
Repeated sequences in eukaryotic genomes can also be located throughout the genome, and are called _______________ repeats. A. tandem; dispersed B. dispersed; tandem C. overlapping; adjacent D. adjacent; overlapping E. None of the answer options is correct.
You perform an experiment in which you take 16 pots of strawberry plants and give half of them 1 gram of ammonium nitrate per liter of water and the other half just gets water. Each group is then split in half again, and exposed to either 8 or 16 hours of light each day. You monitor the height of the plants for four weeks. You observe that increasing ammonium nitrate and light both increase plant height.
Which of the following is/are an independent variable(s) in this experiment? A. the amount of ammonium nitrate B. the height of the plants C. the height of the plants and amount of light D. the amount of ammonium nitrate and light E. the amount of light
An excess of estrogen like molecules can have which
of the following effects on males? a. lower sperm production b. increase hair growth c. tumor growth on the surface of the testes d. increased reproduction e. all of these
Your patient took biology many years ago. You remind her of the structure of DNA and RNA. Which statement is not correct?
A) DNA is usually a double-stranded, helical structure composed of nucleotides, each of which contains a sugar, a phosphate group, and a nucleobase (A, T, C or G). B) The two strands of DNA are complementary and are held together by hydrogen bonds between the nucleobases. C) RNA is a single-stranded molecule composed of nucleotides that contain the nucleobases adenine, thymine, uracil, or cytosine D) RNA nucleotides contain the 5-C sugar ribose while DNA nucleotides contain the 5-C sugar deoxyribose. E) A single linear strand of DNA will always have a 5?PO4 at one end and a 3?OH at the other, referred to as the 5? end (5 prime end) and the 3? end (3 prime end) respectively.