Cnidarians are found in aquatic environments and possess two embryonic germ layers.
Cnidarians belong to the phylum Cnidaria and contain diverse organisms of more than 9000 species.
Cnidaria originates from Greek word "cnidos," which implies stinging nettle.
Over 11000 species of marine and freshwater environments accommodate in this group and is categorized under kingdom Animalia.
In order to capture a prey, special types of cells are present in them called 'cnidocytes'.
In sum, this phylum contains soft-bodied animals which includes jelly fish, sea anemones and corals.
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Answer: The offspring contain one one set of chromosome from the mother and one from the father.
Explanation: During sexual reproduction, when the egg and sperm meet, the sperm contains 23 chromosomes and the egg also contains 23 chromosomes. Together the chromosomes combine, accounting for the genetic information in the offspring.
3. is oxygen the others i would have to double check my book, so give me a minute and I'll try to put the rest in the comments
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Parasympathetic tone holds the resting heart rate below its intrinsic rate.
