Echinoderms lack a centralized nervous system, and echinoderms are represented by the starfish. Given these facts, what lack a centralized nervous system among the following options: - barnacles - nervous fish - insects - bees - Pesticides - alpacas - fish - starfish
starfish

Urine is the liquid waste product of the body that is excreted by the urinary system, and urine tests detect drugs used up to 36 hours before a given urine collection. Given these facts, which bodily system excretes a substance commonly used in drug testing among the following options: - Evaporation - urinary system - animals - aqueous solution - cardiovascular system - opiate system - Integumentary system - sweating
urinary system

Q: An animal requires nutrients to grow and heal, and potassium is an essential nutrient for plants and animals. Given these facts, what does potassium help an animal do among the following options: - Grow - lysing - Sleep - health - Eat - rest - growth - Die
A: Grow

Question: Conserving water can be used for survival in a dry environment, and water conservation saves money and energy. Given these facts, saving water is important for surviving in what kind of environment among the following options: - a cold environment - a dry environment - colder and wetter - threatened - reducing acid rain - a wet environment - to stay warm - a rainy environment
Answer: a dry environment

*Question*
Temperature falls from lower to higher altitudes, and temperatures are cooler in the higher altitudes of the mountains. Given these facts, temperature falls from lower to higher where among the following options: - space - burning coal - underground - mountains - frontal zones - the ground - deserts - burrows
**Answer**
mountains

Loud noises can cause animals to startle, and all mammals are animals. Given these facts, what does loud noises often do to mammals among the following options: - decrease stamina - comfort them - inspire them - quiet them - kill them - to move people - startle them - Movement
startle them