Q: Answer the following question given this paragraph: Each endocrine hormone affects only certain cells, called target cells. A target cell has proteins on its surface to which a given hormone can bind. Most endocrine hormones are controlled by negative feedback loops. Negative feedback occurs when low levels of a hormone feed back to increase its secretionand vice versa. Q: Each endocrine hormone affects only certain "target" cells, which have molecules of what on the surface that enable binding of a given hormone? A:

OPTIONS:
- lipids
- rna
- gas
- protein

A: protein

input: OPTIONS:
- condensation
- seawater happens
- snow
- humidity happens Now, answer this question: Answer the following question given this paragraph: The water cycle plays an important role in weather. When liquid water evaporates, it causes humidity. When water vapor condenses, it forms clouds and precipitation. Humidity, clouds, and precipitation are all important weather factors. Q: What happens when liquid water evaporates? A:
A:
output: humidity happens

Answer the following question given this paragraph: The fetus is connected to the placenta through the umbilical cord. This is a long tube that contains two arteries and a vein. Blood from the fetus enters the placenta through the umbilical arteries. It exchanges gases and other substances with the mother's blood. Then it travels back to the fetus through the umbilical vein. Q: The umbilical cord connects the fetus to what structure? A:

OPTIONS:
- Ovaries
- uterus
- cell
- placenta

Answer: placenta

Problem: OPTIONS:
- overpopulation
- depletion
- mutation
- extinction
Q: Answer the following question given this paragraph: Q: By impacting plant species and the animals they support, destruction of habitat threatens what event? A:
Answer: extinction

Problem:OPTIONS:
- a combination
- a solute
- a solution
- a mixture

Answer the following question given this paragraph: Like a chemical compound, a mixture consists of more than one chemical substance. Unlike a compound, a mixture does not have a fixed chemical composition. The substances in a mixture can be combined in any proportions. A mixture also does not involve a chemical reaction. Therefore, the substances in a mixture are not changed into unique new substances, and they can be separated from each other without a chemical reaction. Q: What is the term for a combination of substances in which there is no chemical reaction? A:
****
A: a mixture

Problem:OPTIONS:
- rectum
- uterus
- bladder
- urethra

Answer the following question given this paragraph: From the collecting ducts of the kidneys, urine enters the ureters , two muscular tubes that move the urine by peristalsis to the bladder (see Figure above ). The bladder is a hollow, sac-like organ that stores urine. When the bladder is about half full, it sends a nerve impulse to a sphincter to relax and let urine flow out of the bladder and into the urethra. The urethra is a muscular tube that carries urine out of the body. Urine leaves the body through another sphincter in the process of urination . This sphincter and the process of urination are normally under conscious control. Q: What is the name of the muscular tube that carries urine out of the body? A:
****
A:
urethra