13. Exponential, limiting
14. Keystone
15. Population (not completely sure on this one, may be something like biodiversity)
Answer:
In most species of frogs, fertilization is external. The male frog grabs the female's back and fertilizes the eggs as the female frog releases them (Figure 2.2B). ... The egg pronucleus and the sperm pronucleus will meet in the egg cytoplasm to form the diploid zygotic nucleus.
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This results in Evolution. Organisms will adapt to their surroundings in the form of evolution.
Lipid is a fat and can be used as an energy reserve.
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Answer:
1. Bacteria cannot live above 100 degrees Celsius; archaea can thrive in extreme temperatures. Archaea are actually extremophiles. They can survive in extreme physical and geochemical conditions.
2. Bacterial cell walls have peptidoglycan (mesh-like structure also known as murein); archaeal cell walls do not have peptidoglycan.
