Answer:
In sexual reproduction, two parents are required to produce a new organism. Most plants and animals, including human beings, reproduce sexually
2. the production of new organism by combining genetic information from two individuals of different types (sexes). in most higher organisms, one sex (male) produces a small motile gamete which travels to fuse with a larger stationary gamete produced by others (female).
The thickness of the uterine lining , becomes very thick...because when the level of hormone progesterone reaches its highest levels. according to Dr.X on yahoo answers.
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Answer:
Increased fitness of large-beaked birds, leading to natural selection
(Why: Birds with larger beaks are better able to survive in the new enviornment)
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