Answer the following question given this paragraph: example, if you hold an ice cube in your hand, the ice cube slowly melts as energy in the form of heat is transferred from your hand to the ice. As your hand loses energy, it starts to feel cold. Because of their interrelationships, energy, work, and heat have the same units. The SI unit of energy, work, and heat is the joule (J). A joule is a tiny amount of energy. For example, it takes about 4 J to warm 1 mL of H2O by 1C. Many processes occur with energy changes in thousands of joules, so the kilojoule (kJ) is also common. Another unit of energy, used widely in the health professions and everyday life, is the calorie (cal). The calorie was initially defined as the amount of energy needed to warm 1 g of H2O by 1C, but in modern times, the calorie is related directly to the joule, as follows: 1 cal = 4.184 J We can use this relationship to convert quantities of energy, work, or heat from one unit to another. The calorie is used in nutrition to express the energy content of foods. However, because a calorie is a rather small quantity, nutritional energies are usually expressed in kilocalories (kcal), also called Calories (capitalized; Cal). For example, a candy bar may provide 120 Cal (nutritional calories) of energy, which is equal to 120,000 cal. Proteins and carbohydrates supply 4 kcal/g, while fat supplies 9 kcal/g. Q: Another unit of energy, used widely in the health professions and everyday life, is _______? A:
OPTIONS:
- carbs
- body index
- biomass ( cal )
- calorie ( cal )
calorie ( cal )

Answer the following question given this paragraph: Q: During diastole, what happens to the elastic walls of the arteries? A:
OPTIONS:
- they expand
- they become hardened
- they evolve
- they snap back

Answer: they snap back

Question: Answer the following question given this paragraph: Animal communication, like most other animal behaviors, increases the ability to survive and have offspring. This is known as fitness. Communication increases fitness by helping animals find food, defend themselves from predators, mate, and care for offspring. Q: What term describes the overall ability of an animal to survive and produce offspring? A:
OPTIONS:
- change
- evolution
- abilities
- fitness
Answer: fitness

input with options: Answer the following question given this paragraph: Population density is the average number of individuals per unit of area or volume. Q: The average number of individuals per unit of area or volume is referred to as a population's what? A:
OPTIONS:
- increase
- diameter
- output
- density
output: density

Q: Answer the following question given this paragraph: Fingernails and toenails consist of specialized epidermal cells that are filled with keratin . The keratin makes them tough and hard, which is important for the functions they serve. Fingernails prevent injury by forming protective plates over the ends of the fingers. They also enhance sensation by acting as a counterforce to the sensitive fingertips when objects are handled. Nails are similar to claws in other animals. They cover the tips of fingers and toes. Fingernails and toenails both grow from nail beds. As the nail grows, more cells are added at the nail bed. Older cells get pushed away from the nail bed and the nail grows longer. There are no nerve endings in the nail. Otherwise cutting your nails would hurt a lot!. Q: What fills the epidermal cells that make up fingernails and toenails? A:

OPTIONS:
- cellulose
- chromatin
- amino acids
- keratin

A: keratin

Answer the following question given this paragraph: A unique feature of echinoderms is their water vascular system . This is a network of canals that extend along each body part. In most echinoderms, the canals have external projections called tube feet (see Figure below ). The feet have suckers on the ends. Muscle contractions force water into the feet, causing them to extend outward. As the feet extend, they attach their suckers to new locations, farther away from their previous points of attachment. This results in a slow but powerful form of movement. The suckers are very strong. They can even be used to pry open the shells of prey. Q: What makes echinoderms force water into the feet and move forward? A:
OPTIONS:
- spring contractions
- vacuum contractions
- field contractions
- muscle contractions
muscle contractions