Some ant colonies consist of a queen, who performs all reproductive duties for the colony, and worker ants, who perform all the labor that the colony needs to gather food, expand and defend territory, and survive. The worker ants
are also able to-but do not-contribute reproductively to the colony. In a colony like this, the worker ants will give
their lives to defend the queen.
What is the most likely explanation for the altruistic behavior of the worker ants?
A. kin selection
B. social exchange
C. social responsibility
D. reciprocity norm

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine. what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

Is it bad to eat a whole cake and tub of ice cream by your self (doing it rn and my mom yelled at me)

Which researcher said that children learn best when given learning tasks that are right for their developmental age?