How do normal cell know when-to divide

Which best describes this behavior? it is beneficial only to the males that do not fertilize eggs. it is beneficial only to the female workers that are not fertilized. it is beneficial to each one of the individual colony members. it is beneficial to the whole species, but not to all of the individual members.

Which of the following are responsible for sending messages from the hypothalamus to the thalamus?

Why is there more biomass at the producer level that at the consumer levels ? how does this relate to the 10% rule ?