(Question)
Q: Low levels of thyroid hormones in the blood cause the release of what by the hypothalamus and pituitary gland? Read this paragraph and choose the correct option from the provided answers: You can see an example of a negative feedback loop in Figure below . It shows how levels of thyroid hormones regulate the thyroid gland. This loop involves the hypothalamus and pituitary gland as well as the thyroid gland. Low levels of thyroid hormones in the blood cause the release of hormones by the hypothalamus and pituitary gland. These hormones stimulate the thyroid gland to secrete more hormones. The opposite happens with high levels of thyroid hormones in the blood. The hypothalamus and pituitary gland stop releasing hormones that stimulate the thyroid. Choices: - acids - bases - enzymes - hormones A:
(Answer)
hormones

(Question)
Q: What is the name of the zone where water is deeper than 200 meters called? Read this paragraph and choose the correct option from the provided answers: The aphotic zone is water deeper than 200 meters. This is where too little sunlight penetrates for photosynthesis to occur. As a result, producers must make "food" by chemosynthesis , or the food must drift down from the water above. Choices: - transition zone - euphotic zone - eccentric zone - aphotic zone A:
(Answer)
aphotic zone

(Question)
Q: What occurs when the crests of one wave overlap the troughs, or lowest points, of another wave? Read this paragraph and choose the correct option from the provided answers: Destructive interference occurs when the crests of one wave overlap the troughs, or lowest points, of another wave. The Figure below shows what happens. As the waves pass through each other, the crests and troughs cancel each other out to produce a wave with zero amplitude. You can see an animation of destructive interference at this URL: http://phys23p. sl. psu. edu/phys_anim/waves/embederQ1.20200. html. Choices: - harmful interference - random interference - constructive interference - destructive interference A:
(Answer)
destructive interference