Fact 1: Urine is the liquid waste product of the body that is excreted by the urinary system. Fact 2: Urine tests detect drugs used up to 36 hours before a given urine collection. Given the two facts above, answer the question "Which bodily system excretes a substance commonly used in drug testing?" with the following options: - Evaporation - urinary system - animals - aqueous solution - cardiovascular system - opiate system - Integumentary system - sweating
urinary system

Fact 1: Breathing is when a gill converts from oxygen in water into oxygen in blood. Fact 2: All fish have gills . Given the two facts above, answer the question "When fish convert oxygen in water to oxygen in blood this is called?" with the following options: - evaporation - barrel-shaped - motility - Heart rate - squeeze - breathing - hormones - survival
breathing

Q: Fact 1: Amphibians are the first true tetrapods, or vertebrates with four limbs. Fact 2: Bullfrogs eat other amphibians. Given the two facts above, answer the question "These belong to the class of creature that were the first true tetrapods:" with the following options: - millipede - crabs - four limbs - bullfrogs - gastropod - a fish - warm-blooded - insects
A: bullfrogs

Question: Fact 1: Erosion causes a river to become deeper and wider. Fact 2: Erosion is the work of wind, water, and time. Given the two facts above, answer the question "The work of what causes a river to become deeper and wider?" with the following options: - looseness of dirt or compost - just time - Veins and arteries. - just wind - Physical weathering - The area was once underwater - just water - wind, water, and time
Answer: wind, water, and time

*Question*
Fact 1: Fossils are formed when layers of sediment cover the remains of organisms over time. Fact 2: Plants and animals are organisms. Given the two facts above, answer the question "What forms when plants are covered in layers of sediment over time?" with the following options: - Conifers - watershred - fossils - H2O - Echinoids - bubbles - loose soil - bones
**Answer**
fossils

*Question*
Fact 1: Behaviors that improve fitness increase through natural selection. Fact 2: Natural selection is the mechanism of evolution. Given the two facts above, answer the question "what do behaviors that improve fitness increase through?" with the following options: - density - evolution - Plants growth - gravity - animals - competition - death - environment
**Answer**
evolution