Birds and frogs both lay eggs, but have different methods of fertilisation. Justify the statement
Answers
Answer:
External fertilization usually occurs in aquatic environments where both eggs and sperm are released into the water. After the sperm reaches the egg, fertilization takes place. Most external fertilization happens during the process of spawning where one or several females release their eggs and the male(s) release sperm in the same area, at the same time. The release of the reproductive material may be triggered by water temperature or the length of daylight. Nearly all fish spawn, as do crustaceans (such as crabs and shrimp), mollusks (such as oysters), squid, and echinoderms (such as sea urchins and sea cucumbers). Figure 1a shows salmon spawning in a shallow stream. Frogs, like those shown in Figure 1b, corals, mayflies, and mosquitoes also spawn.
Answer:
frogs have different stages of growth of egg but bird will break the egg and grow as same
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