Answer:
D. stable environments
Explanation:
In the gradual speciation model, changes in species are slow over time that occur in small steps. Change in speciation rate influences two factors that are environmental conditions and population size.
Gradual speciation mostly occur in large populations that move towards evolution and live in a stable environment. The stable environment provides enough time for the evolution to happen and stable habitat for the new species to grow slowly.
Hence, the correct answer is "D. stable environments".
As an overall average, about 10% of the energy at one trophic level is available to the next-highest rank in the food chain.
Answer: Anaerobic respiration is a type of respiration where oxygen is not used; instead, organic or inorganic molecules.
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Explanation:
Answer:
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The answer is C. Amniotic membrane. It is the <span>Amniotic membrane that surrounds and protects the embryo. It is the innermost layer of the placenta. it consist thick basement of membrane that protects the embryo from any possible harm.
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