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Sharks, whales, and dolphins share similar features such as body shape and the position of fins. However, sharks have gills for breathing,
while whales and dolphins have lungs. These differences indicate that the organisms share a common ancestor for.
Whales also possess a vestigial pelvic bone. The presence of the pelvis bone may indicate that whales.
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pls refer to the pic

Explanation:

I hope this will help u

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.

b) the inside picture would look at a very high temperature in a very low ph