Answer the following question given this paragraph: Q: Cells in a biofilm secrete what to recruit nearby cells? Choices: - signaling proteins - harnessing molecules - signaling neurons - signaling molecules A:
signaling molecules
(Question)
Answer the following question given this paragraph: Hydrocarbons are compounds that contain only carbon and hydrogen atoms. The smallest hydrocarbon, methane (CH 4 ), contains just one carbon atom and four hydrogen atoms. Larger hydrocarbons contain many more. Hydrocarbons with four or more carbon atoms can have different shapes. Although they have the same chemical formula, with the same numbers of carbon and hydrogen atoms, they form different compounds, called isomers . Isomers are compounds whose properties are different because their atoms are bonded together in different arrangements. Q: What do you call compounds whose properties are different because their atoms are bonded together in different arrangements? Choices: - isotopes - mixtures - ionic compounds - isomers A:
(Answer)
isomers
Ques: Answer the following question given this paragraph: The endocrine system consists of glands that secrete hormones into the bloodstream. Q: What system consists of glands that secrete hormones into the bloodstream? Choices: - Respiratory system - nervous system - Muscular system - the endocrine system A:
Ans: the endocrine system
(Q).
Answer the following question given this paragraph: Generators and motors are almost identical in construction but convert energy in opposite directions. Generators convert mechanical energy to electrical energy and motors convert electrical energy to mechanical. Q: Generators convert mechanical energy to which kind? Choices: - kinetic - radiation - static - electrical A:
(A).
electrical
Ques:Answer the following question given this paragraph: A: Electric charges flow when they have electric potential energy. Potential energy is stored energy that an object has due to its position or shape. Q: What is the term for stored energy that an object has due to its position or shape? Choices: - kinetic energy - mechanical energy - vertical energy - potential energy A:

Ans:potential energy
Ques:Answer the following question given this paragraph: Q: Internal body fluids link exchange surfaces to what else? Choices: - ligaments - organs - tissue - body cells A:

Ans:
body cells