Q: Answer the following question given this paragraph: Behavioral isolation occurs when the presence or absence of a specific behavior prevents reproduction from taking place. For example, male fireflies use specific light patterns to attract females. Various species of fireflies display their lights differently. If a male of one species tried to attract the female of another, she would not recognize the light pattern and would not mate with the male. Other prezygotic barriers work when differences in their gamete cells (eggs and sperm) prevent fertilization from taking place; this is called a gametic barrier. Similarly, in some cases closely related organisms try to mate, but their reproductive structures simply do not fit together. For example, damselfly males of different species have differently shaped reproductive organs. If one species tries to mate with the female of another, their body parts simply do not fit together. (Figure 18.19). Q: What occurs when the presence or absence of a specific behavior prevents reproduction from taking place? A:

OPTIONS:
- spontaneous mutation
- natural selection
- primary speciation
- behavioral isolation

A: behavioral isolation

input: OPTIONS:
- Shield
- Dome
- Compound
- composite Now, answer this question: Answer the following question given this paragraph: Composite volcanoes usually have craters on the top. Why are the craters sometimes "U" or horseshoe-shaped?. Q: A crater can usually be found on the top of what kind of volcanoes? A:
A:
output: composite

Answer the following question given this paragraph: Bacteria reproduce by binary fission, resulting in two daughter cells identical to the parent cell. Q: In what way do bacteria reproduce? A:

OPTIONS:
- sexual reproduction
- fragmentation
- cellular respiration
- binary fission

Answer: binary fission

Problem: OPTIONS:
- anaerobic
- digestive
- pulmonary
- respiratory
Q: Answer the following question given this paragraph: Q: Terrestrial animals lose water by evaporation from their skin and which surfaces? A:
Answer: respiratory

Problem:OPTIONS:
- lock
- handle
- pivot
- lever

Answer the following question given this paragraph: The canoe paddles, nutcracker, and hammer that you read about in this lesson have something in common. All three are examples of a type of simple machine called a lever. Q: Canoe paddles, nutcracker, and hammer are examples of what type of simple machine? A:
****
A: lever

Problem:OPTIONS:
- lecithin
- membranes
- eukaryotes
- phospholipids

Answer the following question given this paragraph: The cell membrane consists of two adjacent layers of phospholipids. The lipid tails of one layer face the lipid tails of the other layer, meeting at the interface of the two layers. The phospholipid heads face outward, one layer exposed to the interior of the cell and one layer exposed to the exterior (Figure 3.3). Because the phosphate groups are polar and hydrophilic, they are attracted to water in the intracellular fluid. Intracellular fluid (ICF) is the fluid interior of the cell. The phosphate groups are also attracted to the extracellular fluid. Extracellular fluid (ECF) is the fluid environment outside the enclosure of the cell membrane. Interstitial fluid (IF) is the term given to extracellular fluid not contained within blood vessels. Because the lipid tails are hydrophobic, they meet in the inner region of the membrane, excluding watery intracellular and extracellular fluid from this space. The cell membrane has many proteins, as well as other lipids (such as cholesterol), that are associated with the phospholipid bilayer. An important feature of the membrane is that it remains fluid; the lipids and proteins in the cell membrane are not rigidly locked in place. Q: The cell membrane consists of two adjacent layers of what? A:
****
A:
phospholipids