Fact 1: Amold spore has a negative impact on the respiratory system. Fact 2: Major components of the respiratory system are the lungs, trachea, nose, and the cell. Given the two facts above, answer the question "What has a negative impact on the lungs?" with the following options: - unpolluted air - healthy atmosphere - mold spore - smoking - disease - influenza - clean air - A virus
mold spore

Fact 1: Feathers help birds fly and provide insulation. Fact 2: Some birds are flightless birds. Given the two facts above, answer the question "Why do the flightless have feathers?" with the following options: - layers of fat - Sublimation - it needs them - warm-blooded - Air conditioning - Radiation - Insulation - protect them
Insulation

Q: Fact 1: Organisms use lipids to store energy. Fact 2: Plants and animals are organisms. Given the two facts above, answer the question "What do animals use for energy storage?" with the following options: - photosynthesis - sweating - vitamin C - batteries - methane - glucose - sugar - lipids
A: lipids

Question: Fact 1: If fossils of a water animal or plant are found in a place then that place used to be covered by water in the past. Fact 2: Gastropod Shells of marine animals are often preserved as fossils. Given the two facts above, answer the question "the bones of what can be found to signify that place used to be covered by water?" with the following options: - h2o - living things - dogs - adult sea squirts - bullfrogs - humans - an amoebae - gastropod shells
Answer: gastropod shells

*Question*
Fact 1: Many corals secrete an exoskeleton that builds up to become a coral reef. Fact 2: An insect has a hard outer covering called an exoskeleton. Given the two facts above, answer the question "Many corals secrete what to form a coral reef?" with the following options: - Chlorophyll - salt and water. - The area was once underwater - Chemical energy - aqueous solution - Organic compounds - gastropod shells - hard outer covering
**Answer**
hard outer covering

(Question)
Fact 1: Bacteria can cause people to become ill. Fact 2: Recovery from illness, especially infectious illnesses, or operations, is slow in some people. Given the two facts above, answer the question "bacteria can be infectious and cause people to need what" with the following options: - praise - food - routine - recovery - nutrients - exercise - Bodily water - rest
(Answer)
recovery