*Question*
Sex hormones are chemical messengers that control sexual development and reproduction, and chemical messengers carry signals from one nerve branch to another. Given these facts, _carry signals that control sexual development and reproduction among the following options: - sex hormones - electricity - nucleic acid - Most plants - animals - genes - dendrites - photons
**Answer**
sex hormones

*Question*
Lungs are used for breathing air by land animals, and inside of the lungs are little sacks called alveoli. Given these facts, what are used for breathing air by land animals among the following options: - Frogs - pigeons - gills - alveoli - fish - ferns - four limbs - water
**Answer**
alveoli

*Question*
Climate is the average weather in an area over a long period of time, and climate, on the other hand, looks at long-term averages of weather conditions. Given these facts, what looks at long-term averages in an area over a long period of time among the following options: - habitat - Winter - mild - weather - seasons - three - climate - atmosphere
**Answer**
climate

*Question*
When an electrical circuit is working properly , electrical current runs through that circuit, and an electric current is then used to burn the tumor away. Given these facts, when the electrical circuit is working properly, what can happen among the following options: - dogs can run - heat production - enormous damage to homes - a tumor can be burned away - massive damage - sperm and egg fuse - baskets can be hand-woven - bacteria can thrive
**Answer**
a tumor can be burned away