One of the most common types of bacteria-related diarrhea in the united states, resulting primarily from the ingestion of contaminated water, raw milk, and raw or undercooked meats, is caused by

hemorrhagic colitis -caused by E.coli, most common in children, severe abdominal cramps, vomiting, diarrhea, and a short-lived fever followed by watery, bloody diarrhea. Sources of E.coli; beef, unpasteurized milk, unpasteurized apple juice or cider, raw sprouts, dry cured salami, fresh produce, yogurt, sandwiches, water.

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.

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.