Tag: fertilization and post fertilization in humans

Quizzes (0) Questions (108)

Questions Related to fertilization and post fertilization in humans

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Gestation period of rabbit is

  1. 18 - 20 days

  2. 28 - 32 days

  3. 48 - 50 days

  4. 60 - 70 days
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gestation period is the time taken for embryo development after fertilization of egg in the female animal. 

In humans the gestation period is approximately 38 weeks. The gestation periods of chimpanzees (237 days), gorilla (257 days) and orangutan (260 days) indicate that the approximate nine-month gestation period predates the emergence of human beings as a species. 
The gestation periods of other animal reveals, that the length of the gestation period is largely a matter of the animal specie's size. Asian elephants have a gestation period of 645 days and African elephants 640 days. Dogs and other canines have a gestation period of about 60, which is also the period for cats. Even within the species of apes and monkeys gestation period seem to be a matter of size. For Rhesus monkeys it is 164 days and baboons 187 days. 
For small animals such as rabbits the period is about 33 days and for mice about 20 days. Thus, it appears that it takes a longer time for a big animal such an elephant to grow a baby than for a smaller animals, such as a mouse.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Monoestrous cycle animals may have

  1. One ovulation each month

  2. One egg

  3. One breeding season in a year

  4. One menses each month
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Estrous cycle, or oestrous cycle, is the reproductive cycle found in most mammalian placental females, whereby there are recurring periods when the female is fertile and sexually receptive (estrus) interrupted by periods in which the female is not fertile and not sexually receptive (anestrus). 

Animals that have estrous cycles reabsorb the endometrium (inner membrane of the mammalian uterus) if conception does not occur during that cycle. The estrous cycle is contrasted with the menstrual cycle in which the endometrium is shed through menstruation when pregnancy does not occur and in which the female may be sexually receptive at any time during the cycle. 
There are many variations among animals in terms of their estrous cycles. Some may undergo estrous only one time a year during a particular season (monoestrous example white-tailed deer, foxes), while others may undergo a succession of cycles (polyestrous) during a certain time of the year if they do not become pregnant (horses, sheep), and others may undergo cycles throughout the whole year (mice, cows, pigs).

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Gestation period is minimum in which of the following?

  1. Rabbit

  2. Man

  3. Elephant

  4. Mouse
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gestation period is the time taken for embryo development after fertilization of egg in the female animal. In humans the gestation period is approximately 38 weeks. 

The gestation periods of chimpanzees (237 days), gorilla (257 days) and orangutan (260 days) indicate that the approximate nine-month gestation period predates the emergence of human beings as a species. The gestation periods of other animal reveals that the length of the gestation period is largely a matter of the animal specie's size. 
Asian elephants have a gestation period of 645 days and African elephants 640 days. Dogs and other canines have a gestation period of about 60, which is also the period for cats. Even within the species of apes and monkeys gestation period seem to be a matter of size. For Rhesus monkeys it is 164 days and baboons 187 days. 

For small animals, such as rabbits the period is about 33 days and for mice about 20 days. Thus, it appears that it takes a longer time for a big animal such an elephant to grow a baby than for a smaller animal such as a mouse.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Child birth is called as

  1. Pregnancy

  2. Parturition

  3. Menstruation

  4. Menopause
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Parturition is the process of expulsion of the child from the uterus or womb. It involves three stages- shortening and the opening of the cervix, descent and birth of the baby, and pushing out of the placenta. It is also known as childbirth. Thus the correct answer is option B.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Gestation period of rat is

  1. 20 - 22 days

  2. 28 - 32 days

  3. 52 - 65 days

  4. 60 - 65 days
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The gestation period is the time in which the fetus develops, which starts with the fertilization and ends with the birth. The gestation period of brown rat is 21 days.
Thus, the correct answer is option (A), '20-22 days'.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

The gestation period of elephants is about 

  1. 11 months

  2. 10 months

  3. 15 months

  4. 22 months
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
For mammals, the gestation period is the time in which a foetus develops, beginning with fertilization and ending at birth. The duration of this period varies between species.
Gestation period of an elephant (Asian) is 616 days and elephant (African) is 645 days, approx 22 months.
Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans

Assertion : Predation is an interspecific interaction with a feeding strategy.

Reason :  Predation and their prey maintain fairly stable population through time and rarely one population become abundant or scarce.


  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion

  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion

  3. If the assertion is true but the reason is false

  4. If both the assertion and reason are false

  5. If the assertion is false but reason is true
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Predation is an interspecific interaction with a feeding strategy i.e., one species (prey) is eaten up by another (predator). The number of predator usually depends upon the population of prey, but the later is also controlled by predators. Thus, predatory and the prey maintains fairly stable population through time and rarely one population becomes abundant or scarce.

Multiple choice zoology menustral cycle in human parturition and lactation pregnancy and birth fertilization and post fertilization in humans
Gestation period of $280$ days is calculated from time of

  1. Last menstruation

  2. Fertilization

  3. Next menstruation

  4. Puberty
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The gestation period is calculated from the first day of the last menstrual period. This is used to calculate the expected date of delivery (EDD).

So the correct answer is A.