All plants have a characteristic life cycle that includes alternation of generations, and all ferns are shade plants. Given these facts, what has a characteristic life cycle that includes alternation of generations among the following options: - humans - leaves - Oak - dogs - Trees - cacti - amoeba - ferns
ferns

Infection can cause bodily tissues to swell, and bacteria can cause infection. Given these facts, bacteria can cause what among the following options: - common cold - dead organisms - influenza - viral infections - bodily tissues to swell - contamination - Something that causes allergies - harmful substances
bodily tissues to swell

Q: Treating water is used to remove harmful substances before drinking, and arsenic, a naturally occurring substance, contaminates water sources in many countries. Given these facts, what is treating water used to remove before drinking among the following options: - arsenic - air - cellulose - chemicals - Collagen - loose dirt - water vapor - ice
A: arsenic

Question: Temperature falls from lower to higher altitudes, and temperature values are in degrees celsius. Given these facts, what falls from lower to higher altitudes among the following options: - gravity - colder and wetter - water vapor - kinetic energy - density - degrees Celsius - heat energy - altitude
Answer: degrees Celsius

*Question*
Moss causes chemical weathering, and chemical weathering is strongest in tropical environments. Given these facts, where is moss the strongest among the following options: - near the shoreline - looseness of dirt or compost - The area was once underwater - It used to be covered by water - dead organisms - tropical environments - our nearest star - the body's largest organ
**Answer**
tropical environments

*Question*
Fungi have special structures for penetrating a host, and parasitic plants and fungi can attack animals. Given these facts, what do some parasitic creatures have special structures for among the following options: - Making friends - produce offspring - sensory neurons - protect them - Penetrate animals - Building sheds - Learning facts - resistance
**Answer**
Penetrate animals