Amphibians have a relatively complex circulatory system with a three-chambered heart, and frogs, toads and salamanders are amphibians. Given these facts, which animal has a circulatory system with a three-chambered heart among the following options: - animals - Salamander - fur seals - mammals - alpacas - a fish - warm-blooded - barnacles
Salamander

Killing microorganisms in food can be used to extend the shelf life of that food, and bacteria are microorganisms that exist everywhere. Given these facts, bacteria can be killed to extend the shelf life of what among the following options: - milk - rocks - coffee - edible - food - phytoplankton - influenza - tuna
food

Q: Plants have specialized reproductive organs, and flowers are a plant's reproductive organs. Given these facts, what are specialized organs in plants among the following options: - potatoes - breathing - Epidermis - alveoli - PDAs - flowers - epidermal - genus
A: flowers

Question: Recycling reduces the resources needed to make something, and recycling saves resources and reduces pollution. Given these facts, recycling reduces what when making something among the following options: - fossil fuels - pollution - Energy. - less water - power - energy - Heat energy - deforestation
Answer: pollution

*Question*
Exercise increases a body 's strength, and strength is balanced with flexibility and all systems of the body are toned. Given these facts, what helps increase flexibility and muscle tone among the following options: - movement - hydration - fitness membership - fats - hypertrophy - arteries - exercise - Proteins
**Answer**
exercise

Sweating reduces body heat, and clothing reduces the effectiveness of sweating as a means of cooling the body. Given these facts, what does taking off one's clothing improve the efficacy of among the following options: - recovery - hydration - Sweating - Modesty - Waterproofing - Exfoliation - Honesty - staying warm
Sweating