Two men may be the father of a child. Figure 8.2 shows the results of a DNA fingerprint analysis to determine paternity. M is the mother, C is the child, A and B are the two men. What is the best interpretation of these results?
A. The man identified as A is probably the father.
B. The man identified as B is probably the father.
C. Neither man is this child's father.
D. Either man could be this child's father.
E. Paternity cannot be determined from this data.
Answer: B
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At the endodermis is a thin band of hydrophobic material that prevents water passage between cells called the:
A. Casparian strip. B. cortex. C. medulla. D. plasmodesmata. E. parenchyma.
Which of the following is not true regarding the history of life on Earth?
A. The history of planet Earth includes alternations between colder periods ("icehouses") and warmer periods ("greenhouses") on the surface of the planet. B. The rise of more complex organisms such as eukaryotes has resulted in a reduction in diversity of more "primitive" organisms such as bacteria. C. There have been repeated incidents of mass extinction in the history of the planet in which species diversity has been reduced by 50% or more.
The best terms for a fish whose body temperature varied between 4oC during the day when it is in deep, cold ocean waters and 26oC during the night when it comes to the surface to feed would be
A. endothermic and homeothermic. B. endothermic and heterothermic. C. ectothermic and homeothermic. D. ectothermic and heterothermic. E. ectothermic and endothermic.
Multicellular algae come in different shapes
What will be an ideal response?