What is the outermost covering of trees and some plants called?

Bark
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Related trivia

What substance, found in food, helps move wastes through the body?
Fiber
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What body system is the human heart part of?
Circulatory System
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What is a cell that provides energy for another organism called?
Host Cell
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What is an urolith?
A Bladder Stone
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What connects flower buds to the stem?
Sepals
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What is the cell where a virus reproduces called?
Host Cell
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What part of the flower surrounds the inside parts of the flower?
Petals
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What is on your tongue that allows you to taste the differences in different foods?
Taste Buds
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What is the basic unit of function and structure in living organisms?
Cells
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What organ filters blood and helps regulate salt and water levels?
Kidneys
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What are the tiny blood vessels that connect arteries and veins?
Capillaries
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What is made by white blood cells to help fight off infection?
Antibody
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What do conifers use to hold seeds?
Pine Cones
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What is an algal bloom that occurs in salt water called?
Red Tide
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What are the small bones that make up a backbone called?
Vertebrae
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What does the substance melanin control?
Color Of The Skin
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What natural biological defense system protects the body from disease and fights off germs?
Immunity
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What is the human body's largest organ?
Skin
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What do many types of birds, such as geese, do just before it begins to get colder?
Migrate
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What nerve tissue transmits light signals from your eye lens to the brain?
Retina
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What is the outside covering of a plant's root called?
Root Epidermis
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Fish take in oxygen through their gills; what do insects take in oxygen through?
Spiracles
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What part of the brain controls hunger?
Hypothalamus
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What do you count on a tree to tell how old it is?
Rings
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