Biology - Chapter 46 | 暗記メーカー

Biology - Chapter 46

15問 • 1年前

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問題一覧

In an animal that switches between sexual and asexual reproduction, when is sexual reproduction more likely to occur?

when conditions for survival are unfavorable

What makes sexually reproduced offspring genetically different from their parents?

genetic recombination during meiosis

A pregnant woman comes into the hospital past her due date. The doctor decides it is time for the baby to be delivered. Before performing a cesarean section, the doctor wants to try to induce labor. Which of the following would she most likely inject?

oxytocin

Sexual reproduction _______.

can produce diverse phenotypes that may enhance survival of a population in a changing environment

Asexual reproduction results in offspring that are genetically identical to their parent. What type of cell process occurs to generate this type of offspring?

mitosis

A reproductive hormone that is secreted directly from a structure in the brain is _____.

gonadotropin-releasing hormone (GnRH)

In vertebrate animals, spermatogenesis and oogenesis differ in that ______.

cytokinesis is unequal in oogenesis, whereas it is equal in spermatogenesis

Among mammals, the male and female genital structures that consist mostly of erectile tissue include the ____.

penis and clitoris

Human sperm cells first arise in the _______.

seminiferous tubules

Increasing the temperature of the human scrotum by 2°C (that is, near the normal body core temperature) and holding it there would most likely _____.

reduce the fertility of the man by impairing spermatogenesis

The primary function of the corpus luteum is to _________.

maintain progesterone and estrogen synthesis after ovulation has occurred

The surgical removal of the seminal vesicles would likely ______.

greatly reduce the volume of semen

Which statement about human reproduction is correct?

A human oocyte completes meiosis after a sperm penetrates it.

In close comparisons, external fertilization often yields more offspring than does internal fertilization. However, internal fertilization typically offers the advantage that ______.

the smaller number of offspring produced often receive a greater amount of parental investment

Among non-mammalian vertebrates, the cloaca is an anatomical structure that functions as ______.

a shared pathway for the digestive, excretory, and reproductive systems

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quiz 1 for biochem

quiz 1 for biochem

問題一覧

In an animal that switches between sexual and asexual reproduction, when is sexual reproduction more likely to occur?

when conditions for survival are unfavorable

What makes sexually reproduced offspring genetically different from their parents?

genetic recombination during meiosis

oxytocin

Sexual reproduction _______.

can produce diverse phenotypes that may enhance survival of a population in a changing environment

Asexual reproduction results in offspring that are genetically identical to their parent. What type of cell process occurs to generate this type of offspring?

mitosis

A reproductive hormone that is secreted directly from a structure in the brain is _____.

gonadotropin-releasing hormone (GnRH)

In vertebrate animals, spermatogenesis and oogenesis differ in that ______.

cytokinesis is unequal in oogenesis, whereas it is equal in spermatogenesis

Among mammals, the male and female genital structures that consist mostly of erectile tissue include the ____.

penis and clitoris

Human sperm cells first arise in the _______.

seminiferous tubules

Increasing the temperature of the human scrotum by 2°C (that is, near the normal body core temperature) and holding it there would most likely _____.

reduce the fertility of the man by impairing spermatogenesis

The primary function of the corpus luteum is to _________.

maintain progesterone and estrogen synthesis after ovulation has occurred

The surgical removal of the seminal vesicles would likely ______.

greatly reduce the volume of semen

Which statement about human reproduction is correct?

A human oocyte completes meiosis after a sperm penetrates it.

In close comparisons, external fertilization often yields more offspring than does internal fertilization. However, internal fertilization typically offers the advantage that ______.

the smaller number of offspring produced often receive a greater amount of parental investment

Among non-mammalian vertebrates, the cloaca is an anatomical structure that functions as ______.

a shared pathway for the digestive, excretory, and reproductive systems