Study and Learn with 1000s of Biology MCQs
Mating MCQs (human and animals)
a female oyster, Every season releases about _ eggs into the water
1.02 trillion
1 billion
60 million
10 million
60 million
the length of time the fetus is developing inside a female mammal is called?
Gestation period
Menstrual period
Fertilization period
None of these
Gestation period
Gestation period in deer is approximately?
2 months
five or six months
2 years
3 years
five or six months
_ keeps a check on how much of the hormones estrogen and progesterone are floating through the bloodstream
Spinal cord
thalamus
Hypothalamus
None of these
Hypothalamus
When the levels of the hormones estrogen and progesterone in bloodstream decline, the hypothalamus secretes a hormone called _ hormone
gonadotropin-releasing
Insulin
Glucagon
thyroxin
gonadotropin-releasing
The _ can detect when the levels of estrogen and progesterone have reached the point where the lining of the uterus is ready for implantation
Spinal cord
thalamus
Hypothalamus
None of these
Hypothalamus
If fertilization Has occurred: The fertilized egg implants in the lining of the uterus
and an embryo begins developing. That embryo immediately starts to
secrete the hormone _
Insulin
Glucagon
thyroxin
human chorionic gonadotropin
human chorionic gonadotropin
The presence of _ ensures that estrogen and progesterone production continue so the lining of the uterus remains nourished by larger blood vessels
Insulin
Glucagon
thyroxin
human chorionic gonadotropin
human chorionic gonadotropin
Endometrium is?
Lining of uterus
fetus
Vaginal cavity
None of these
Lining of uterus
Ovarian cycle takes about _ to go from beginning to end
13 days
28 days
1 month
2 months
28 days
After a follicle develops and releases an egg, the empty follicle is called?
corpus luteum
Spermatozoa
ovary
Endometrium
corpus luteum
__ helps keep the lining of the uterus rich with blood and nutrients for the developing embryo
testosterone
progesterone
Insulin
oxytocin
progesterone
Human Mating MCQs
in human eggs, the zone that prevents fertilization by a different species is called?
zona pellucida
corpus luteum
Spermatozoa
Endometrium
zona pellucida
the male reproductive system is made up of?
the penis
the testes
the seminiferous tubules
All of these
All of these
The female reproductive system consists of?
the vagina
the uterus
the ovaries
the fallopian tubes
All of these
All of these
In females, the _ is the sexually sensitive organ
the fallopian tubes
the uterus
clitoris
None of these
clitoris
_ is the bottom end of the uterus
cervix
clitoris
vagina
None of these
cervix
tubules in the scrotum that store produced sperm are called?
the fallopian tubes
epididymides
clitoris
vagina
epididymides
tubes that carry sperm from the scrotum to the urethra are called?
the fallopian tubes
epididymides
clitoris
vas deferens
vas deferens
Semen includes _
A pH of 7.5
Prostaglandins
Fructose
All of these
All of these
_ gives the sperm energy to swim upstream
glycerol
Fructose
valine
None of these
Fructose
_ cause contractions of the uterus that help propel the sperm upward.
Prostaglandins
Insulin
Glucagon
adrenaline
Prostaglandins
The average amount of semen expelled during one ejaculation contains _ sperm
less than 400 million
more than 400 million
more than 1 billion
More than 10 billion
more than 400 million
To fertilize the egg, the sperm produces enzymes in a structure near its nucleus called?
Amylase
protease
acrosome
Lipase
acrosome
Animals Mating MCQs
The process by which bees reproduce is called?
spermatogenesis
parthenogenesis
Parthenocarpy
oogenesis
parthenogenesis
_ in bird’s egg serves to nourish the embryo throughout its development
Albumen
yolk
clitoris
None of these
Albumen
The __ is the initial cell tissue that begins to develop into a baby bird
Blastoderm
epithelial
spermatozoa
None of these
Blastoderm
The blastoderm is the initial cell tissue that begins to develop into a baby bird; it separates into a _, which is the top layer
Hypoblast
metablast
epiblast
None of these
epiblast
The blastoderm is the initial cell tissue that begins to develop into a baby bird; it separates into a epiblast, which is the top layer and __, which is lower layer
Hypoblast
metablast
epiblast
None of these
Hypoblast
_ are hermaphrodites
insects
herbivores
humans
Earthworms
Earthworms
job of _ is to secrete mucus and help the sperm get from the vas deferens of one worm to the seminal receptacle of the other worm
citella
Hypoblast
metablast
epiblast
citella
_ are the external, smooth, nonsegmented parts of an earthworm
Hypoblast
metablast
epiblast
citella
citella
Which of these can reproduce both asexually and sexually?
insects
Planarian worms
earthworms
None of these
Planarian worms
Chimpanzees have _ chromosomes per cell
46
48
44
40
48
