Chpt 46 Hmwk

8 July 2024
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question
Salamander and insect populations consisting only of genetically identical females lack males because _____. males are killed at birth by their mothers sperm do not fuse with eggs during reproduction, but the eggs develop into embryos anyway a mutation in the population has eliminated the salamander equivalent of the Y chromosome a sex-linked, dominant, lethal mutation is fixed in the population these ancient forms preceded sexual evolution
answer
sperm do not fuse with eggs during reproduction, but the eggs develop into embryos anyway
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The "reproductive handicap" for sexual reproduction refers to _____. the difficulty of finding mates the need for maturation prior to reproduction dependence on hormonal cycles have only half the offspring are females the need to provide energy for the offspring
answer
have only half of the offspring of females
question
Animals utilizing external fertilization are typically _____. land animals insects animals that reproduce asexually aquatic animals mammals
answer
aquatic animals
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Which of the following correctly traces the path of sperm from their site of production to their exit from a man's body? epididymis ā†’ urethra ā†’ seminiferous tubule ā†’ vas deferens epididymis ā†’ seminiferous tubule ā†’ vas deferens ā†’ urethra seminiferous tubule ā†’ epididymis ā†’ vas deferens ā†’ urethra seminiferous tubule ā†’ vas deferens ā†’ epididymis ā†’ urethra vas deferens ā†’ epididymis ā†’ urethra ā†’ seminiferous tubule
answer
semineferous tubule - epididymis - vas deferense - urethra
question
Sexual reproduction includes a reproductive pattern called _____. fragmentation fission regeneration budding hermaphroditism
answer
hermaphroditism
question
Suppose you wanted to start an animal-breeding business. For most of the following animals, you could start out with just a single animal. Which of the animals below would require that you start with at least two individuals? tapeworms stony corals sea anemones whiptail lizards in the genus Aspidoscelis frogs
answer
frogs
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The most primitive vertebrates whose reproductive pattern includes the amniotic eggs are the _____. bony fish birds reptiles amphibians mammals
answer
reptiles
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In humans, oogenesis in comparison to spermatogenesis is different in that _____. oocyte production works best at cooler temperatures than those that support spermatogenesis oogenesis continues throughout life, but spermatogenesis typically ends at age 55 years female puberty typically occurs much later than the age of male puberty oogenesis does not complete meiosis until after fertilization, but spermatogenesis is complete before the sperm leave the body the names and chemical identities of the pituitary hormones are completely different between males and females
answer
oogenesis doesn't complete meiosis until after fertilization, but spermatogenesis is complete before the sperm leave the body
question
Select the correct statement about reproduction and eukaryotic life cycles. In all eukaryotic life cycles, the products of meiosis are gametes. Animal reproduction is exclusively sexual. Some animal adults are haploid.
answer
some animal adults are haploid
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What is the "twofold" cost of sex? The cost of finding and courting a mate The cost of producing sexual structures and sex hormones The higher number of female offspring produced by an asexual female
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the higher number of female offspring produced by an asexual female
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In an animal that switches between sexual and asexual reproduction, when is sexual reproduction more likely to occur? when conditions for survival are favorable when conditions for survival are unfavorable when males and females find each other What conditions favor sexual over asexual remains a complete mystery
answer
when conditions for survival are unfavorable
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Regeneration, the regrowth of lost body parts, normally follows _____. fragmentation fission parthenogenesis all types of asexual reproduction
answer
fragmentation
question
On a submarine expedition to the ocean bottom, you discover a population of fish that are only female. What type of reproduction does this fish most likely use? parthenogenesis budding cloning sexual
answer
parthenogenesis
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Females of many insect species, including honeybee queens, can store gametes shed by their mating partners in _____. the abdominal tract the spermatheca the uterus their nests
answer
the spermatheca
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You decide to study two species of birds, both of which form monogamous pairs (one male and one female). In species 1, you find that the eggs in a pair's nest are in fact almost always the offspring of that pair. In species 2, you are surprised to find that many of the eggs in a nest were actually fathered by males of neighboring pairs. Apparently, mating outside of monogamous pairings is widespread in species 2. Given this information, what would be the logical prediction to make before comparing testes size of males of the two species? Testes of species 1 are larger than testes of species 2. Testes of species 2 are larger than testes of species 1. There is no relationship between this observation and the size of testes.
answer
testes of species 2 are larger than testes of species 1
question
Animals that have external fertilization are most likely to reproduce in which of the following areas? polar ice sheet shallow lake tallgrass prairie sand dune
answer
shallow lake
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Asexual reproduction results in offspring that are genetically identical to their parent. What type of cell process occurs to generate this type of offspring? meiosis mitosis cell fusion
answer
mitosis
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What makes sexually reproduced offspring genetically different from their parents? genetic recombination during meiosis crossing over during mitosis genetic recombination during mitosis Sexual reproduction does not produce genetically different offsprin
answer
genetic recombination during meiosis
question
Among non-mammalian vertebrates, the cloaca is an anatomical structure that functions as _____. a shared pathway for the digestive, excretory, and reproductive systems a specialized sperm-transfer device produced only by males a source of nutrients for developing sperm in the testes a gland that secretes mucus to lubricate the vaginal opening
answer
a shared pathway for digestive, excretory, and reproductive systems