False, mass number is protons plus neutrons. not subtraction.
Independent Variable: Scenarios (such as different times of the day or places) used to check if a person will become depressed or not.
Dependent Variable: Number of people diagnosed with depression.
Constant: Amount of people who do not understand depression.
Control: How your setting can impact mood and performance.
Answer:
nucleolus
Explanation:
The nucleus contains the cell 's DNA and directs the synthesis of ribosomes and proteins. Found within the nucleoplasm, the nucleolus is a condensed region of chromatin where ribosome synthesis occurs.
Answer:
Decomposers recycle essential nutrients back into an ecosystem
Explanation:
An ecosystem works thanks to the constant transformation of energy. The role of the decomposers will be to transform energy into something useful in the ecosystem. For example, The bacteria which will rotten the apples that fall from a tree onto the ground are recycling or making available this energy for other organisms to use it. As part of this example, the essential nutrients of the apples will be available to be reabsorved by the roots of the apple tree thanks to the transformation of energy done by the bacteria in the apples.