The color of human skin depends upon
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__________ is the interaction in which one species benefits and the other is neither harmed nor benefited.
Organisms that use light to prepare food are known as _____.
Harmful bacteria in potable water make the water
Which of the following is the largest part of the human brain?
Which feature of a plant helps to distinguish a monocot from a dicot?
The body of all complex animals consist of only _______ basic types of tissue(s).
Algae belongs to which of the following levels of the ecosystem?