Which of the following observations is NOT an example of intra-sexual competition? Killing young individuals who are not one s own offspring Guarding harem one has secured Having a specialized penile morphology that can displace other malesâ sperms Having a showy display to attract a mate
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Killing young individuals who are not one s own offspring
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Guarding harem one has secured
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Having a specialized penile morphology that can displace other malesâ sperms
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Having a showy display to attract a mate
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- 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 CamScannerMale California sea lion mating success is determined by the number of mates they can acquire. Larger males are more successful at maintain larger territories. Females remain in one territory for the duration of the mating season and larger territories support more females than smaller territories. Additionally, the most successful males will fast during mating season to remain present in their territory at all times. If they leave to hunt they risk loss of their territory and access to all the females present in it. Which of the following best describes sexual selection in this species? a. Males likely engage in male-male combat to maintain territories. b. Intersexual selection is likely stronger than intrasexual selection. c. Sexual selection on the females is stronger than on the males. d. Females will mate with smaller males at a higher frequency than larger malesWhich of the following IS TRUE about sexual dimorphism (choose all that apply)? Group of answer choices it refers to morphological differences between the sexes it refers to the principles of selecting reproductive partners No answer text provided. in represents a form of intraspecific variation
- Large testes are probably advantageous in species with sperm competition because larger testes produce more sperm which increses males' probability of fertilization females choose males based on testes size more testosterone production increases fighting ability of males larger testes produce larger sized sperm which have a competitive advantage over other spermPolygyny is a common mating system in nature. Which one of the following scenarios is LEAST likely to result in a polygynous mating system? Male stalk-eyed flies form leks where receptive females come visit Male Neotropical giant damselfly defend water-filled tree holes, which are the oviposition sites for females. Suitable tree holes for oviposition are rare and females must mate with the resident male in exchange for access to the oviposition sites. Male Bengal tigers defend large territories that contain food sources. Female Bengal tigers visit male territories to mate. The density of the Bengal tiger is extremely low that male tigers rarely encounter more than one female in their lifetime. In the bumblebee-wolf Philanthus bicinctus, females are unreceptive until they finish constructing the long underground burrow as nest sites. Males search for locations containing a number of newly constructed burrows and attempt to control these sites against the intruders. Your cousin Peter…Per several primatological studies, the reason behind infanticide appears to be: aSuper aggression in males bIt is caused by pathological behavior cIt helps improve reproductive fitness dPost-partum depression in females
- Which of the following statements is NOT the reason why females are choosy? By being choosy, she can acquire advantageous genotypes for her offspring from her mates. By being choosy, she can acquire resource for her offspring from her mates. By being choosy, she can ensure that her male offspring can attract more females as well. Her seeming choosiness is a by-product of her stereotypical behaviors exploited by the males for mating gains. All listed above are reasons why she is choosySecondary sexual characteristics or sexual often result from sexual selection? O dichotomy O hermaphrodites O monogamy O dimorphism A Moving to another question will save this response. escIs the following case study an r-strategist or a K-strategist? American toads practice explosive reproduction. During the first warm days in spring, both males and females migrate from forests and converge on ponds. Reproduction is quick, taking only a few days. Females lay hundreds of eggs in jelly-filled sacks along the sides of the pond or stream. As soon as the eggs are laid, males and females abruptly leave the pond. Offspring are left to develop, hatch, and grow on their own, maturing in about three months.
- Explain why hermaphroditism is a good solution to enjoy the benefits of sex while also confronting the problem of finding a mate in a sparse population.We discussed environmental sex determination in reptiles, where the sex of the individual is determined by environmental factors rather than chromosomes. Which of the following modes of sex determination would also fit that category? hermaphroditic earthworms hermaphroditic hermaphroditic all of the above nudibranchs (the "penis fencers") coral reef fishWhich of the following observations or hypotheses is most consistent with the Bateman-Trivers paradigm? sperm are frail and few can actually fertilize an egg males attempt to secure large territories to attract many females male spiders mate only once are sometimes eaten by females O females seek many mates to ensure genetic diversity in their young