Which of the following describes the most important difference between invertebrates and vertebrates?
a) invertebrates contain multiple tissues, while vertebrates do not
b) vertebrates contain a backbone, while invertebrates do not
c) invertebrates contain a backbone, while vertebrates do not
d) vertebrates contain multiple tissues, while invertebrates do not
Ans: b) vertebrates contain a backbone, while invertebrates do not
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Which of the following populations would you expect to have the most genetic diversity within the group?
A. A true-breeding stock of tomato plants B. The F1 generation of tomato plants from the cross of two different true-breeding stocks C. A stock of tomato plants that is not true breeding
Secondary treatment of sewage involves the use of which type of process?
A. Virus removal/inactivation B. Biological removal of inorganic nutrients C. Biological removal of dissolved organic matter D. Physical/chemical removal of insoluble particulate materials
Earthworms have a(n) ____
a. exoskeleton b. endoskeleton c. hydrostatic skeleton d. segmental skeleton e. squishy skeleton
When male and female hangflies mate, the number of sperm transferred to the female increases linearly with an increased time of mating. What determines the length of time that male and female hangflies mate?
What will be an ideal response?