Phil is conducting a seed germination experiment. He places three groups of lettuce seeds in a 34º Celsius incubator with adequate moisture. One set of seeds is placed in a dark area with no light source. A second set is placed under artificial light, and third set of seeds is placed in direct sunlight. This experiment is intended to test Phil's hypothesis that light is necessary for lettuce seed germination.Based on the experimental design, which variable was the dependent variable?
A. germination rate
B. type of light
C. seeds in the dark
D. moisture
E. temperature
Answer: A
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David has a lab assignment where he must cut out shapes of chromosomes and place two chromosomes of the same shape and size together. Two chromosomes of the same size and shape are termed a ____ pair
Fill in the blank with the appropriate word.
The yellow-bellied glider is a mammal whose continued survival depends on undisturbed eucalyptus forests
a. True b. False
The bones of synovial joints are held in place by ____
a. tendons b. loose connective tissue c. ligaments d. cartilage e. other bones
Of all the possible amino acids, all living organisms make use of only the same 20 amino acids. This supports the idea that
A) only a limited number of DNA mutations are possible. B) bacteria, animals, and plants developed independently. C) natural selection drives evolution. D) only 20 amino acids exist on Earth. E) all living things are derived from a single common ancestor.