Which of the following is an example of homeostasis? the lungs of animals excrete carbon dioxide. the beaks of some birds are hooked in shape. we feel cooler when we stand under the shade of a tree. we feel warmer when all the windows are shut on a cold night.

Explanation:

This is the most logical answer, because others don't have any common point with homeostasis.

Remember that homeostasis refers to all processes that are internally develop in a system in order to maintain the equilibrium, reacting to external stimulation. Which is the case in the first option, carbon dioxide expulsion from animal's lungs is a homeostasis process, because it help to maintain the standard function of the internal systems.

a few examples of ethical concerns involving genetically engineering of humans include

-privacy of genetically tested people

- potential side effects

-long term effects

essentially, one bacterial cell splits into two daugurer cells. bacterial offspring don't need or get care from their parents because they are in a sense their own parents. that said, some bacteria can and do depend on other bacteria especially in harsh environments such as bacterial microfilms in hot water tanks.