A direct method of measuring the rate of entry of sperm into sea urchin eggs.
D000818:Animals; D004447:Echinodermata; D005260:Female; D005306:Fertilization / Q000187:drug effects; D008297:Male; D009538:Nicotine / Q000494:pharmacology; D009596:Nitrophenols / Q000494:pharmacology; D010063:Ovum; D013094:Spermatozoa
D009596:Nitrophenols; D009538:Nicotine