Problem: OPTIONS:
- tropic and subtropic
- pheromones and enzymes
- endorphins and adrenaline
- tropic and sex
Q: Answer the following question given this paragraph: 46.4 The interplay of tropic and sex hormones regulates mammalian reproduction. Q: What two types of hormones regulate mammalian reproduction? A:
Answer: tropic and sex

Problem:OPTIONS:
- iodine and magnesium
- sodium and magnesium
- xerophyte and magnesium
- iron and magnesium

Answer the following question given this paragraph: First, notice where carbon is fixed by the enzyme Rubisco. In C-3, C-4, and CAM plants, CO 2 enters the cycle by joining with 5-carbon ribulose bisphosphate to form a 6-carbon intermediate, which splits (so quickly that it isn't even shown) into two 3-carbon 3-phosphoglycerate molecules. Now look for the points at which ATP and NADPH (made in the light reactions) add chemical energy ("Reduction" in the diagram) to the 3-carbon molecules. The resulting glyceraldehyde-3-phosphate "half-sugars" can enter several different metabolic pathways. One recreates the original 5-carbon precursor, completing the cycle. A second combines two of the 3-carbon molecules to form glucose, the universal fuel for life. The cycle begins and ends with the same 5-carbon RuBP molecule, but the process combines carbon and energy to build carbohydrates food for life. Q: What elements do mafic minerals typically include? A:
****
A: iron and magnesium

Answer the following question given this paragraph: The Sun makes up almost all of the mass of the solar system. Q: What celestial body in the solar system makes up most of its total mass? A:
OPTIONS:
- Jupiter
- earth
- Andromeda
- sun
sun

Answer the following question given this paragraph: Q: In the freshwater flatworms, protonephridia serve chiefly in what? A:
OPTIONS:
- enculturation
- excretion
- thermoregulation
- osmoregulation

Answer: osmoregulation

Question: Answer the following question given this paragraph: Wild plants and animals maintain a valuable pool of genetic variation . This is important because domestic species are genetically uniform. This puts them at great risk of dying out due to disease. Q: Unlike wild animals, what type of species are genetically uniform, making them more vulnerable to die-out from disease? A:
OPTIONS:
- free-range species
- urbane species
- mammals
- domestic species
Answer: domestic species

input: OPTIONS:
- one
- five
- three
- four Now, answer this question: Answer the following question given this paragraph: There are four major forces of evolution that cause allele frequencies to change. They are mutation, gene flow, genetic drift, and natural selection. Q: How many major forces of elevation cause allele frequencies to change? A:
A:
output:
four