Answer the following question given this paragraph: The kidneys filter all the blood in the body many times each day and produce a total of about 1.5 liters of urine . The kidneys control the amount of water, ions, and other substances in the blood by excreting more or less of them in urine. The kidneys also secrete hormones that help maintain homeostasis. Erythropoietin , for example, is a kidney hormone that stimulates bone marrow to produce red blood cells when more are needed. They also secrete renin, which regulates blood pressure, and calcitriol, the active form of vitamin D, which helps maintain calcium for bones. The kidneys themselves are also regulated by hormones. For example, antidiuretic hormone from the hypothalamus stimulates the kidneys to produce more concentrated urine when the body is low on water. Q: Which organ in the human body filters blood and excretes urine? Choices: - the liver - the bladder - the thyroid - the kidney A:
the kidney
Answer the following question given this paragraph: Sebaceous glands are commonly called oil glands. They produce an oily substance called sebum. Sebum is secreted into hair follicles. Then it makes its way along the hair shaft to the surface of the skin. Sebum waterproofs the hair and skin and helps prevent them from drying out. Q: What oily substance prevents the hair and skin of living things from drying out? Choices: - pus - progesterone - pancreatic enzymes - sebum A:
sebum
Q: Answer the following question given this paragraph: 15.2 Sponges and Cnidarians Animals included in phylum Porifera are parazoans and do not possess true tissues. These organisms show a simple organization. Sponges have multiple cell types that are geared toward executing various metabolic functions. Cnidarians have outer and inner tissue layers sandwiching a noncellular mesoglea. Cnidarians possess a well-formed digestive system and carry out extracellular digestion. The cnidocyte is a specialized cell for delivering toxins to prey and predators. Cnidarians have separate sexes. They have a life cycle that involves morphologically distinct formsmedusoid and polypoidat various stages in their life cycle. Q: Porifera are parazoans that exhibit simple organization and lack true what? Choices: - molecules - nuclei - cell membranes - tissues A:
A: tissues
Question: Answer the following question given this paragraph: The wavelength of visible light determines the color that the light appears. Light with the longest wavelength appears red, and light with the shortest wavelength appears violet. In between are the wavelengths of all the other colors of light. Q: Light with the shortest wavelength appears as what color? Choices: - red - green - blue - violet A:
Answer: violet
*Question*
Answer the following question given this paragraph: As plant cells grow, they also become specialized into different cell types. Once cells become specialized, they can no longer divide. So how do plants grow after that? The key to continued growth is meristem. Meristem is a type of plant tissue consisting of undifferentiated cells that can continue to divide. Q: Once a plant cell becomes specialized, what can they no longer do? Choices: - photosynthesis - cellular respiration - osmosis - divide A:
**Answer**
divide
Q: Answer the following question given this paragraph: Earth's magnetosphere is controlled by the magnetic field. The magnetosphere protects the planet from the solar wind . The solar wind is ions that fly from the Sun to Earth very fast. The magnetosphere protects Earth's ozone layer. So life on Earth needs the protection of the magnetosphere. Q: What controls earth's magnetosphere? Choices: - ionosphere - stratosphere - gravitational field - magnetic field A:
A: magnetic field