), as did formerly Prevost and Dumas with other animals, that more than one spermatozoon is requisite to fertilise an ovum. [Please select]
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These almost infinitely numerous and minute gemmules are contained within each bud, ovule, spermatozoon, and pollen-grain. [Please select]
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These almost infinitely numerous and minute gemmules must be included in each bud, ovule, spermatozoon, and pollen-grain. [Please select]
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] The spermatozoon is also like that of other animals, consisting of a rounded head and a lash-like tail, the movements of which enable it to move rapidly through the water. [Please select]
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The egg of _Hydra_ is said to be fertilized as it lies at the base of the ectoderm, through which the fertilizing spermatozoon bores its way. [Please select]
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