While analyzing forensic evidence gathered at a crime scene, a lab technician assigned to the case compares DNA collected at the scene to DNA from three suspects. The technician finds that all three suspects have genetic maps that are similar to the DNA collected at the scene, but they all have a number of unique markers that differ from the DNA evidence. What conclusion can be drawn from these facts?
a. The evidence from the crime scene has been contaminated and is no longer admissible in court.
b. All three suspects belong to the same family as the person who left their DNA at the crime scene.
c. All three suspects probably belong to the same species as the individual who left DNA at the scene.
d. None of the suspects were at the crime scene, and they no longer need to be investigated in this case.
c. All three suspects probably belong to the same species as the individual who left DNA at the scene.
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Male peacocks have tail feathers that make up about 60% of their body length. During the mating season they contract muscles to shake these feathers in front of females; females evaluate the feather rustling as part of selecting their mate
The __________ is the mechanistic cause of this behavior; the ___________ is the adaptive function of this behavior. A. mate choice; ability to shake the tail B. ability to shake the tail; mate choice C. female evaluation of the behavior; ability to shake the tail D. ability to shake the tail; female evaluation of the behavior
The molecular explanation for narcolepsy is that
A) certain brain cells have many extra orexin/hypocretin receptors, so these cells receive too many messages to sleep. B) the orexin/hypocretin receptor does not reach the cell surfaces of certain brain cells. C) a gene is missing in chromosome 6 that encodes the protein narcoleptin. D) a viral infection activates genes that promote sleep.
Would you describe the water cycle as slow or rapid? What will be an ideal response?
What is the correct series of events during parturition?a. The amnion breaks.b. The cervix dilates.c. ACTH causes the adrenal cortex to release androgens into the bloodstream.d. Prostaglandins and oxytocin are produced.e. The baby is born and the umbilical cord is cut.f. The placenta is delivered.
A. c - b - f - a - e - d B. c - d - b - f - a - e C. c - d - b - a - e - f D. a - d - b - c - e - f E. c - d - a -b - e - f