Individuals with down syndrome have an extra chromosome 21. this is an example of which type of chromosome disorder? duplication nondisjunction translocation

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.

Coral reefs support more species per unit area than any other marine environment on earth. what is one way coral reefs are important to the health of the biosphere

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat