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what are factors affecting the libido:

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שאלה #148897

done		All of the answers are correct
		social effect
		endocrine factors
		systemic diseases
		genotypic variance

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מיין לפי דירוג חדש ישן

In dogs, the percentage of sperm with normal morphology is:

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שאלה #148898

done		80%
		75%
		70%
		65%
		60%

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מיין לפי דירוג חדש ישן

According to Bateman's principle:

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שאלה #148899

done		There is low variability in the reproductive success of females
		There is low variability in the reproductive success of males
		Additional matings lead to additional offspring
		Limited by access to females
		All of the answers are correct

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מיין לפי דירוג חדש ישן

When a dams fly mates with more than one male, the competition for fertilization ends with:

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שאלה #148902

done		Active removal of sperm from a previous male by the penis of the current male inseminating
		Removal of sperm cells by the female during mating
		Expulsion of non-sperm materials by the current male inseminating to "flush out" previous sperm before fertilization
		Expulsion of large quantities of sperm by the current male inseminating, competing with previously present sperm in the reproductive tract
		Release of "anti-aphrodisiacs" by the current male inseminating to deter females from further mating

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מיין לפי דירוג חדש ישן

In bees, wasps, and ants, the ratio of males to females in the mating population is:

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שאלה #148905

done		Dependent on the location - a certain balance of males and females exists when there is no choice
		Dependent on how attractive a specific sex is - if he or she is more attractive, the offspring will be of the same species
		Dependent on the help provided in caring for the offspring - the sex that assists more has an advantage
		Dependent on the weather - more males when the weather is good
		Dependent on the weather - more females when the weather is good

נערך לפני חודש

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מיין לפי דירוג חדש ישן

The stimulus that causes capacitation of sperm can be:

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שאלה #148908

done		All answers are correct
		Zona pellucida
		Cumulus cells
		Fluids of the oviduct
		None of the answers is correct

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מיין לפי דירוג חדש ישן

In reptiles and birds, the mechanism to prevent polyspermy may involve:

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שאלה #148917

done		The oocyte allows entry of multiple sperm but only one will be allowed to develop
		Blocking of the zona pellucida
		Possible electrical changes - depolarization between the inner and outer regions of the oocyte to prevent sperm binding
		The oviduct does not allow sperm to pass towards the egg
		The release of toxic substances to the perivitelline space

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מיין לפי דירוג חדש ישן

In birds, viable sperm can remain viable in the female reproductive tract for:

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שאלה #148918

done		Two to three weeks
		Two to three days
		Two to three months
		One year
		Less than a day

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מיין לפי דירוג חדש ישן

In pigs, the blastocyst hatches from the Zona pellucida after:

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שאלה #148919

done		6 days
		7 days
		8 days
		10 days
		11 days

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מיין לפי דירוג חדש ישן

In cattle, embryo migration occurs:

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שאלה #148920

done		Doesn't occur
		occurs from day 10
		occurs from day 12
		occurs from day 20
		occurs from day 2

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מיין לפי דירוג חדש ישן

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