Bio 105 Final Exam Test Questions
with Guaranteed Pass Solutions 2025-
2026 Updated.
Asexual reproduction results in offspring that are genetically identical to their parent. What type
of cell process occurs to generate this type of offspring?
a) cell fusion
b) mitosis
c) meiosis
d) fertilization - Answer B
What makes sexually reproduced offspring genetically different from their parents?
a) genetic recombination during mitosis
b) crossing over during mitosis
c) genetic recombination during mitosis
d) Sexual reproduction does not produce genetically different offspring. - Answer C
Sexual reproduction ________.
a) is better suited to environments with relatively contant conditions
b) results in over hald of the offspring being female
c) is completed more rapidly than asexual reproduction
d) produces offspring of greater genetic variety compared to offspring resulting from asexual
reproduction - Answer B
Environmental cues that influence the timing of reproduction generally do so by _________.
a) providing access to water for external fertilization
b) direct effects on hormonal control mechanisms
c) increasing the body temperature
d) increasing ambient temperature most favorable for sex - Answer B
In close comparisons, external fertilization often yields more offspring than does internal
fertilization. However, internal fertilization typically offers the advantage that ________.
a) it permits the most rapid population increase
b) it requires less time and energy to be devoted to reproduction
c) the smaller number of offspring produced often receive a greater amount of parental
investment
,d) it requires expression of fewer genes and maximizes genetic stability - Answer C
Mature human sperm and ova are similar in that they _________.
a) both have the same number of chromosomes
b) are approximately the same size
c) are produced from puberty until death
d) each have a flagellum that provides motility - Answer A
Among human males, both semen and uring normally travel along the __________.
a) seminal vesicles
b) ureter
c) urethra
d) vas deferens - Answer C
Increasing the temperature of the human scrotum by 2 degrees celsius and holding it there
would most likely ___________.
a) reduce the fertility of the man by impairing spermatogenesis
b) increase the fertility of the affected man by enhancing the rate of steroidgenesis
c) reduce the fertility of the man by impairing the production of gonadal steroid hormones
d) reduce the man's sexual interest - Answer A
In the figure, which structure is the site of embryo implantation?
a) B
b) C
c) D
d) E - Answer D
In the figure, which letter points to the vas deferens?
a) A
b) B
c) C
d) D - Answer D
An inactivating mutation in the progesterone receptor gene would likely result in _________.
a) the inability of the uterus to support pregnancy
,b) the absence of secondary sex characteristic
c) the absence of mammary gland development
d) enlarged and hyperactive uterine endometrium - Answer A
The primary function of the corpus luteum is to _________.
a) nourish and protect the egg cell
b) support pregnancy in the second and third trimesters
c) stimulate the development of the mammary glands
d) maintain progesterone and estrogen synthesis after ovulation has occurred - Answer D
In excreted urine, a reliable "marker" that a pregnancy has initiated is _________.
a) progesterone
b) follicle-stimulating hormone
c) human chronic gonadotropin (hCG)
d) estrogen - Answer C
Two contraceptive methods that are considered permanent and that block the gametes from
moving to a site where fertilization can occur are _________.
a) vasectomy and tubal ligation
b) the male condom and female condom
c) the diaphragm and subcutaneous progesterone implant
d) the male condome and oral contraceptives - Answer A
Which of the following characterizes parthenogenesis?
a) An individual may change its sex during its lifetime.
b) An egg develops without being fertilized.
c) Specialized groups of cells grow into new individuals.
d) An organism is first a male and then a female. - Answer B
Peaks of LH and FSH production occur during _________.
a) the secretory phase of the uterine cycle
b) the period just before ovulation
c) the beginning of the follicular phase of the ovarian cycle
d) the menstrual flow phase of the uterine cycle - Answer B
, During human gestation, rudiments of all organs develop __________.
a) in the third trimester
b) during the blastocyst stage
c) in the first trimester
d) in the second trimester - Answer C
Fertilization of an egg without activation is most like _________.
a) placing the key in the ignition of a car but not starting the engine
b) preparing a pie from scratch and baking it in the oven
c) resting during halftime of a basketball game
d) walking to the cafeteria and eating lunch - Answer A
During fertilization, the acromosomal contents _________.
a) help propel more sperm toward the egg
b) trigger the completion of meiosis by the sperm
c) block polyspermy
d) digest the protective jelly coat on the surface of the egg - Answer D
Which of the following correctly displays the sequence of developmental milestones?
a) gastrula-blastula-cleavage
b) cleavage-blastula-gastrula
c) blastula-gastrula-cleavage
d) cleavage-gastrula-blastula - Answer B
The archenteron of the developing sea urchin eventually develops into the __________.
a) blastocoel
b) digestive tract
c) brain and spinal cord
d) heart and lungs - Answer B
At the time of implantation, the human embryo is called a _________.
a) fetus
b) zygote
c) blastocyst
d) gastrula - Answer C
with Guaranteed Pass Solutions 2025-
2026 Updated.
Asexual reproduction results in offspring that are genetically identical to their parent. What type
of cell process occurs to generate this type of offspring?
a) cell fusion
b) mitosis
c) meiosis
d) fertilization - Answer B
What makes sexually reproduced offspring genetically different from their parents?
a) genetic recombination during mitosis
b) crossing over during mitosis
c) genetic recombination during mitosis
d) Sexual reproduction does not produce genetically different offspring. - Answer C
Sexual reproduction ________.
a) is better suited to environments with relatively contant conditions
b) results in over hald of the offspring being female
c) is completed more rapidly than asexual reproduction
d) produces offspring of greater genetic variety compared to offspring resulting from asexual
reproduction - Answer B
Environmental cues that influence the timing of reproduction generally do so by _________.
a) providing access to water for external fertilization
b) direct effects on hormonal control mechanisms
c) increasing the body temperature
d) increasing ambient temperature most favorable for sex - Answer B
In close comparisons, external fertilization often yields more offspring than does internal
fertilization. However, internal fertilization typically offers the advantage that ________.
a) it permits the most rapid population increase
b) it requires less time and energy to be devoted to reproduction
c) the smaller number of offspring produced often receive a greater amount of parental
investment
,d) it requires expression of fewer genes and maximizes genetic stability - Answer C
Mature human sperm and ova are similar in that they _________.
a) both have the same number of chromosomes
b) are approximately the same size
c) are produced from puberty until death
d) each have a flagellum that provides motility - Answer A
Among human males, both semen and uring normally travel along the __________.
a) seminal vesicles
b) ureter
c) urethra
d) vas deferens - Answer C
Increasing the temperature of the human scrotum by 2 degrees celsius and holding it there
would most likely ___________.
a) reduce the fertility of the man by impairing spermatogenesis
b) increase the fertility of the affected man by enhancing the rate of steroidgenesis
c) reduce the fertility of the man by impairing the production of gonadal steroid hormones
d) reduce the man's sexual interest - Answer A
In the figure, which structure is the site of embryo implantation?
a) B
b) C
c) D
d) E - Answer D
In the figure, which letter points to the vas deferens?
a) A
b) B
c) C
d) D - Answer D
An inactivating mutation in the progesterone receptor gene would likely result in _________.
a) the inability of the uterus to support pregnancy
,b) the absence of secondary sex characteristic
c) the absence of mammary gland development
d) enlarged and hyperactive uterine endometrium - Answer A
The primary function of the corpus luteum is to _________.
a) nourish and protect the egg cell
b) support pregnancy in the second and third trimesters
c) stimulate the development of the mammary glands
d) maintain progesterone and estrogen synthesis after ovulation has occurred - Answer D
In excreted urine, a reliable "marker" that a pregnancy has initiated is _________.
a) progesterone
b) follicle-stimulating hormone
c) human chronic gonadotropin (hCG)
d) estrogen - Answer C
Two contraceptive methods that are considered permanent and that block the gametes from
moving to a site where fertilization can occur are _________.
a) vasectomy and tubal ligation
b) the male condom and female condom
c) the diaphragm and subcutaneous progesterone implant
d) the male condome and oral contraceptives - Answer A
Which of the following characterizes parthenogenesis?
a) An individual may change its sex during its lifetime.
b) An egg develops without being fertilized.
c) Specialized groups of cells grow into new individuals.
d) An organism is first a male and then a female. - Answer B
Peaks of LH and FSH production occur during _________.
a) the secretory phase of the uterine cycle
b) the period just before ovulation
c) the beginning of the follicular phase of the ovarian cycle
d) the menstrual flow phase of the uterine cycle - Answer B
, During human gestation, rudiments of all organs develop __________.
a) in the third trimester
b) during the blastocyst stage
c) in the first trimester
d) in the second trimester - Answer C
Fertilization of an egg without activation is most like _________.
a) placing the key in the ignition of a car but not starting the engine
b) preparing a pie from scratch and baking it in the oven
c) resting during halftime of a basketball game
d) walking to the cafeteria and eating lunch - Answer A
During fertilization, the acromosomal contents _________.
a) help propel more sperm toward the egg
b) trigger the completion of meiosis by the sperm
c) block polyspermy
d) digest the protective jelly coat on the surface of the egg - Answer D
Which of the following correctly displays the sequence of developmental milestones?
a) gastrula-blastula-cleavage
b) cleavage-blastula-gastrula
c) blastula-gastrula-cleavage
d) cleavage-gastrula-blastula - Answer B
The archenteron of the developing sea urchin eventually develops into the __________.
a) blastocoel
b) digestive tract
c) brain and spinal cord
d) heart and lungs - Answer B
At the time of implantation, the human embryo is called a _________.
a) fetus
b) zygote
c) blastocyst
d) gastrula - Answer C
