Answer the following question given this paragraph: The evolution of life on Earth wasn't always smooth and steadyfar from it. Living things had to cope with some astounding changes. Giant meteorites struck Earth's surface. Continents drifted and shifted. Ice ages buried the planet in snow and ice for millions of years at a time. At least five times, many, if not most, of Earth's living things went extinct. Extinction occurs when a species completely dies out and no members of the species remain. But life on Earth was persistent. Each time, it came back more numerous and diverse than before. Q: Ice ages, continental drift, and giant meteorites striking earth have caused what phenomenon? A:
OPTIONS:
- gravity
- waves
- depletion
- extinction
extinction

Answer the following question given this paragraph: Diagram of a typical prokaryotic cell. Among other things, prokaryotic cells have a plasma membrane, cytoplasm, ribosomes, and DNA. Prokaryotes do not have membrane-bound organelles or a cell nucleus. Q: What are unique about prokaryotic cells' organelles? A:
OPTIONS:
- no cell walls
- no epidermis
- only membrane - bound
- not membrane-bound

Answer: not membrane-bound

Question: Answer the following question given this paragraph: T F = 9 T C + 32 5 5 T C = T F 32 9 T K = T C + 273.15 T C = T K 273.15 Systems are in thermal equilibrium when they have the same temperature. Thermal equilibrium occurs when two bodies are in contact with each other and can freely exchange energy. The zeroth law of thermodynamics states that when two systems, A and B, are in thermal equilibrium with each other, and B is in thermal equilibrium with a third system, C, then A is also in thermal equilibrium with C. 13.2 Thermal Expansion of Solids and Liquids Thermal expansion is the increase, or decrease, of the size (length, area, or volume) of a body due to a change in temperature. Thermal expansion is large for gases, and relatively small, but not negligible, for liquids and solids. Linear thermal expansion is. Q: Systems are in thermal equilibrium when they have the same of what measurement? A:
OPTIONS:
- oxygen
- density
- mass
- temperature
Answer: temperature

input with options: Answer the following question given this paragraph: The components of a mixture keep their own identity when they combine. Therefore, they usually can be easily separated again. Their different physical properties are used to separate them. For example, oil is less dense than water, so a mixture of oil and water can be separated by letting it stand until the oil floats to the top. Other ways of separating mixtures are shown in Figure below and in the videos below. Q: The components of what keep their own identity when they combine and can usually be easily separated? A:
OPTIONS:
- alloy
- solution
- compound
- mixture
output: mixture

Q: Answer the following question given this paragraph: Asexual reproduction can be very rapid. This is an advantage for many organisms. It allows these organisms to crowd out other organisms that reproduce more slowly. Bacteria, for example, may divide several times per hour. Under ideal conditions, 100 bacteria can divide to produce millions of bacterial cells in just a few hours. However, most bacteria do not live under ideal conditions. If they did, the entire surface of the planet would soon be covered with them. Instead, their reproduction is kept in check by limited resources, predators, and their own wastes. This is true of most other organisms as well. Q: Bacteria may divide several what an hour? A:

OPTIONS:
- cells
- hosts
- days
- times

A: times

Answer the following question given this paragraph: Within the microsporangium, the microspore mother cell divides by meiosis to give rise to four microspores, each of which will ultimately form a pollen grain (Figure 32.7). An inner layer of cells, known as the tapetum, provides nutrition to the developing microspores and contributes key components to the pollen wall. Mature pollen grains contain two cells: a generative cell and a pollen tube cell. The generative cell is contained within the larger pollen tube cell. Upon germination, the tube cell forms the pollen tube through which the generative cell migrates to enter the ovary. During its transit inside the pollen tube, the generative cell divides to form two male gametes (sperm cells). Upon maturity, the microsporangia burst, releasing the pollen grains from the anther. Q: Within the microsporangium, the microspore mother cell divides by meiosis to give rise to four microspores, each of which will ultimately form this? A:
OPTIONS:
- zygote
- sperm cell
- ova
- pollen grain
pollen grain