If mammals breathe with the help of something that presses against the stomach muscles, then what is pressed against when mammals breathe? Answer choices: - objects that have mass - the skin - an organism's body - an object - layers of fat - matter vibrating - a cuticle - stomach muscles
stomach muscles

(Question)
If cocaine causes the muscular walls of blood vessels to contract, then cocaine causes what to contract? Answer choices: - layers of fat - a lot of human deaths - Walls of blood vessels. - harmful substances - the rest of the body - metabolic reaction - direct damage to the lungs - decreases its bodily water
(Answer)
Walls of blood vessels.

Ques: If earth's orbital motion around the sun is key to the leaves of many trees changing colors, then what factor is instrumental behind the change of leaf colors during the year? Answer choices: - organisms and their habitat - global warming - Earth orbiting the Sun - Solar energy - scattered light - Greenhouse gases - Varying light output from sun - Moon orbiting the Earth
Ans: Earth orbiting the Sun

(Q).
If competition can cause harm, then what can cause harm? Answer choices: - Sulfur dioxide - burning coal - Medical treatment - treats - Good feelings - cigarettes - competition - emissions
(A).
competition

Ques:If hemp is used to produce electricity by burning, then what is used to produce electricity by burning? Answer choices: - rocks - Gas - fish - hemp - sunlight - coal - oil - Oak

Ans:hemp

Ques: If blowing air into a whistle causes sound, then blowing what into a whistle causes sound? Answer choices: - a lack of noise - CFCs - CO 2 - a lack of sound - wind - air - gas - no noise
Ans:
air