Fertilization produces a
What will be an ideal response?
zygote
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Which one of the following statements about RNA is incorrect?
A. The nucleotide at the 5' end of an RNA molecule is typically a nucleoside triphosphate. B. RNA is usually found in double-stranded form, just like DNA. C. RNA molecules are typically shorter than DNA molecules. D. RNA molecules can form base pairs within a single strand. E. RNA molecules are capable of evolving their enzymatic activity over time.
DNA repair processes require the cooperative efforts of a substantial number of proteins, including which of the following?
a) proteins that recognize and proteins that remove a portion of the strand containing a lesion b) cytoskeletal proteins c) proteins that replace the missing segment with complementary nucleotides d) both proteins that recognize and proteins that remove a portion of the strand containing a lesion and proteins that replace the missing segment with complementary nucleotides
The aquatic plant Elodea is commonly used to study photosynthesis. You put some Elodea in a test tube, shine light on the plant, and count the bubbles that were released under varying conditions. Which results would you expect to see in your analysis of photosynthetic rate?
A. At low light intensities, the number of bubbles increase as temperature increases and the number of bubbles decrease as carbon dioxide concentration decreases. B. As light intensity increases, the number of bubbles increase and then rapidly decrease. C. At high light intensities, the number of bubbles increase as carbon dioxide concentration increases. D. At high light intensities, the number of bubbles increase when the temperature is increased to human body temperature (37 degrees C). E. The number of bubbles increase indefinitely with increased illumination.
Why are modern light microscopes better than the ones Leeuwenhoek used?
A) Modern microscopes have a fivefold better resolution. B) Modern microscopes are compound instead of simple. C) Modern microscopes have lenses with smaller numerical apertures. D) Modern lenses are made of prisms. E) Modern microscopes are compound and have fivefold better resolution.