input: OPTIONS:
- staurikosaurus
- fluctuations
- Sediments
- chemoautotrophs Now, answer this question: Answer the following question given this paragraph: Chemoautotrophs are cells that break down inorganic molecules to supply energy for the cell, and use carbon dioxide as a carbon source. Chemoautotrophs include prokaryotes that break down hydrogen sulfide (H 2 S the "rotten egg" smelling gas), and ammonia (NH 4 ). Nitrosomonas , a species of soil bacterium, oxidizes NH 4 + to nitrite (NO 2 - ). This reaction releases energy that the bacteria use. Many chemoautotrophs also live in extreme environments such as deep sea vents. Q: What are the cells that break down inorganic molecules to supply energy for the cell, and use carbon dioxide as a carbon source? A:
A:
output: chemoautotrophs

Answer the following question given this paragraph: For a full description of weight, look at Forces: Mass versus Weight. In sum, weight is the result of the force of gravity being opposed by the normal force. As we just learned, objects in orbit are in freefall; they have nothing exerting a normal force against them and thus no weight. Q: What property is the result of the force of gravity being opposed by the normal force? A:

OPTIONS:
- light
- density
- sound
- weight

Answer: weight

Problem: OPTIONS:
- mineral
- reaction
- solution
- isotope
Q: Answer the following question given this paragraph: All atoms of the same element have the same number of protons, but some may have different numbers of neutrons. For example, all carbon atoms have six protons, and most have six neutrons as well. But some carbon atoms have seven or eight neutrons instead of the usual six. Atoms of the same element that differ in their numbers of neutrons are called isotopes . Many isotopes occur naturally. Usually one or two isotopes of an element are the most stable and common. Different isotopes of an element generally have the same physical and chemical properties. That's because they have the same numbers of protons and electrons. For a video explanation of isotopes, go to this URL:. Q: What is the name of an element with a different number of neutrons? A:
Answer: isotope

Problem:OPTIONS:
- plants
- air
- minerals
- sunlight

Answer the following question given this paragraph: Living things must have chemical energy from food to power life processes. Most of the chemical energy in food comes ultimately from the energy in sunlight. Q: Most of food's chemical energy ultimately comes from what source? A:
****
A: sunlight

Answer the following question given this paragraph: structure in angiosperms consisting of male and female reproductive structures that attracts animal pollinators. Q: Angiosperms possess reproductive structures that attract animals that perform what role? A:
OPTIONS:
- evolution
- vegetation
- isolation
- pollination
pollination

Answer the following question given this paragraph: Watch this video (http://openstaxcollege. org/l/pollen_release) to see a cedar releasing its pollen in the wind. Female Gametophyte The female cone also has a central axis on which bracts known as megasporophylls (Figure 32.10) are present. In the female cone, megaspore mother cells are present in the megasporangium. The megaspore mother cell divides by meiosis to produce four haploid megaspores. One of the megaspores divides to form the multicellular female gametophyte, while the others divide to form the rest of the structure. The female gametophyte is contained within a structure called the archegonium. Q: What does the megaspore mother cell produce after meiosis division? A:
OPTIONS:
- four diploid megaspores
- two diploid megapores
- two haploid megaspores
- four haploid megaspores

Answer:
four haploid megaspores