Explain pheromones and theorize why they are not significantly employed by humans. What will be an ideal response?
ANSWER: Pheromones are chemical signals that can be detected by other members of the same species.
The downside of them is that they tend to broadcast a relatively general message to all
species members that can detect. In the case of humans, our social interactions tend to be
complex and specific to different individuals. As a result, pheromones would not be very
effective.
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What key words does the question contain and what do they mean?
What will be an ideal response?
In which phase does the centromere break?
What will be an ideal response?
Neoplasms are described as malignant when _____.
A) they produce the pigment melanin and significantly darken the area of the tumor B) they remain confined or encapsulated within a well-defined region C) they stimulate growth of blood vessels directly into the tumor D) they can be eradicated only by surgery, chemotherapy, or radiation E) tumor cells break away from the primary tumor and establish secondary colonies