i think answer is D animal in the rain forest
Mass Extinction of dinosaurs
Answer:
Explanation:
Some cancers go unrecognised because they tend not to grow in a steady, linear order. These tumors can remain dormant for long periods of time unless triggered by a promoter agent that will promote its growth followed by a period of rapid and fast growth, such as occurs after angiogenesis is initiated. Thus, equipment that will be extremely sensitive to the processes that these cells before they metastasize has to be developed to detect their presence. Some available equipments detect their actions through the substances they shed into the bloodstream but these cells would have begun metastasis by this period.
Answer:
The correct answer is option B. pheromones.
Explanation:
Pheromones are chemical substances that are released and produced by a different type of animals, into the environment, for marking their territory or affecting behaving of its species.
Wolves communicate by the chemical messages using their sense of smell. Such chemical messages are called pheromones, between different members of the same species.
Thus, the correct answer is option B. pheromones.
