The correct answer is B. Pheromones are released into the environment rather than being held within the body.
Explanation
Pheromones are chemical substances secreted by living beings, in order to cause specific behaviors in other individuals of the same species. They are a means of transmitting volatile signals produced in liquid form, which are then dispersed throughout the environment. This is used by different species of plants and animals as a means of communication and almost all send one or more codes by this means, both to attract or reject each other sexually as well as for other purposes. According to the above, the correct answer is B. Pheromones are released into the environment rather tan being held within the body.
Answer:
i think a is correct as males have tetosterone and females have estrogen and progesterone
GM insulin has some advantages over insulin taken from pigs or cattle: very large amounts of insulin can be made. it is less likely to cause an adverse reaction. it overcomes ethical concerns from vegetarians and others.
