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- Female spotted sandpipers aggressively court males and, aftermating, leave the clutch of young for the male to incubate. Thissequence may be repeated several times with different males untilno available males remain, forcing the female to incubate her lastclutch. Which of the following terms best describes this behavior?(A) polygyny(B) polyandry(C) promiscuity(D) certainty of paternityIn what ways do primate females differ from most other mammals their size? [Select] (Select] Female primates give birth to more offspring Primate females invest less time in their offspring Most primates have only 1 offspring at a time, none of these1.) Lynx mate in March and have litters of 3 to 5 kittens in May. Lynx kittens are born blind and naked . Their eyes open after 10 days. In 12 weeks , the kittens travel with their mother. They watch and learn how to hunt for hares. Their eyesight is more acute than their hearing or sense of smell. Lynx are active at night (nocturnal). Hares have litters of 2 to 4 offspring, with up to 4 litters over a summer. Hares are born with their eyes open and bodies fully haired. Birth weight doubles in 8 days. Hares use their good hearing and super sensitivity to ground vibrations, as well as speed and coordination, to escape lynx. Hares are active at night and spend the day grooming and resting. A.) Classify the lynx as a r- or K-selected species . Provide evidence from the information given to support your choice .
- Nuptial gift in crickets: duormous are male Understand the examples of species with sex-role reversal. Sex role reversal In some empid fies, the operational sex ratio is heavily female biased, because most males are off hunting for insect prey that is used as a nuptial gift When a male enters the swarm with a nuptial gift. he may find females advertising themselves with unusually large patterned wings, legs or abdomen. Is this always the case? m le diaclans Sex role reversal Sex role reversal Pipefish males have a brood pouch in which females lay their eggs. Provide nutnients and oxygen for a clutch of eggs for several weeks (male "pregnancy") Females compete formales. Males how more interest in feeding thanin mating. transfers to the female an spermatophore (-24% of the male's body mass). Males can only afford to mate orice. qpa cs Scanned with CamScanner"Skates and chimeras are oviparous, whereas rays and many sharks are viviparous. Being viviparous means that they _____." Have internal fertilization Have external fertilzation Give birth to live young Lay eggsMammals are most successfulland dominant animals todaygive evidence?
- Part A Consider the temperature effect in the sex determination of a turtle species represented in the graph below. 100 What effect would a decrease in temperature below the epivotal temperature have on sex ratios of these turtles? 50 Тр Temperature FT MT No difference in the proportion of females to males will result as only colder temperatures will alter the sex ratio in the offspring. None of the other answers is correct. Fewer males and females will result. O More males than females will result. More females than males will result. Percent femaleIn most mammal species, a male is _____ to provide parental carebecause his confidence of paternity is _____.a. likely; highb. unlikely; highc. likely; lowd. unlikely; lowTwo animals of different species would be least likely to O produce fertile offspring (offspring that can make babies together) O eat the same food O have similar body structures O live successfully in the same habitat Quiz saved at e O O O
- What is Bateman's principle? Bateman's principle Lots of sperm Feweggs Sperm must compete over eggs Vria iepaduivesc ie mudigae in males tan in female The vane isame ete emity of sa elecion Males must compete overfemales Lots of sperm Feweggs A Terrnitoral males direct more courtship dispiays towards females that have shown up on their teritory for the first time compared to long term females companions. Males must maimce the number of mates Preferencefor "new females A single bird eggmay constitute 15-20% of female's body mass Lots of sperm Few eggs Females must maimize reproductive success per egg CS Scanned with CamScannerWhich species, other than humans, cares long term for offspring that are not their own: Chimpanzees Bonobos Both of these Neither of these (only humans do)Because the reproductive success of female Hanuman langurs (Semnopithecus entellus) is almost certainly lowered when a newly installed male kills their young infants, selection should favor countermeasures against infanticidal males. In this light, why might already pregnant females mate with a new male soon after a takeover even though they are not ovulating? What significance do you attach to the discovery that when mares are impregnated by stallions at stables away from their home locations, they will also copulate repeatedly with the males in their home stables upon their return?
