Oestrous Cycle

Q. In non-primate mammals like cow, sheep, rat, dog etc., cyclical changes occurring during their reproductive phase is called

1. Oestrus cycle
2. Growth cycle
3. Menstrual cycle
4. Gestation period

Q. In which of the following organisms oestrus cycle does not take place?

1. Lion
2. Rabbit
3. Rat
4. Monkey

Q. Assertion: In non-primate mammals, cyclical changes that occur during reproduction is called oestrus cycle whereas in primates, it is called the menstrual cycle.
Reason: The females of placental mammals exhibit cyclical changes in the activities of ovaries and accessory ducts as well as hormones during the reproductive phase.

1. If both assertion and reason are true and the reason is the correct explanation of assertion.
2. If both assertion and reason are true but the reason is not the correct explanation of assertion.
3. The assertion is true but the reason is false.
4. Both assertion and reason are false.

Q.

The cyclic changes in the activities of ovaries and accessory ducts as well as hormones during the reproductive phase of placental primates and non-primates are called respectively

1. Menstrual cycle and oestrus cycle

2. Oestrous cycle and menstrual cycle

3. Oestrous cycle and oestrus cycle

4. Menstrual cycle and menstrual cycle

Q.

The cyclic changes in the activities of ovaries, accessory ducts as well as hormones during the reproductive phase of placental primates and non-primates are called ___ and ___ respectively.

1. Oestrous cycle and menstrual cycle

2. Menstrual cycle and oestrus cycle

3. Oestrous cycle and oestrus cycle

4. Menstrual cycle and menstrual cycle

Q.

Which is the largest big cat in the world?

Q.

In total, how many of the following animals show oestrus cycle and menstrual cycle respectively?

Cow, Human, Gorilla, Tiger, Deer, Dog, Monkey, Rat and Sheep.

1. 4 and 5

2. 2 and 7

3. 3 and 6

4. 6 and 3

Q.

Capacitation refers to changes in the

1. sperm after fertilization

2. ovum after fertilization

3. ovum before fertilization

4. sperm before fertilization

Q. In non-primate mammals the cyclical changes that occur during reproductive phase are called __________.

1. menstrual cycle
2. oestrus cycle
3. puberty
4. None of the above

Q.

Oestrous cycle occurs in:

1. Monkey

2. Chimpanzee

3. Human being

4. Dog

Q.

Induced abortion is also called

1. MTP

2. PID

3. SID

4. IUD

Q. The mother of a two-month old baby is in intense lactation phase, this intensely lactating mother did not conceive for the first few months, the underlying phenomenon for this being

1. suppression of fertilisation
2. suppression of gonadotropins
3. hypersecretion of gonadotropins
4. suppression of post-fertilisation events

Q.

In mammals oestrus cycle is possible in seasonal breeders?give discription to satisfy the statement.

Q. In a hypothetical situation, two different species were being observed for their behavioral patterns.
Observation 1 and 2 were obtained for the animals in group 1 and 2 respectively during the time they were supposedly in their reproductive phases.
Observation 1:- The animals preferred to mate throughout the year.
Observation 2:- The animals only preferred to mate in certain specific parts of the year.

Based on the observations, the animals could be broadly classified respectively as

1. Continuous breeders, seasonal breeders
2. Seasonal breeders, non-breeders
3. Non-breeders, continuous breeders
4. Seasonal breeders, continuous breeders

Q.

The cyclic changes in the activities of ovaries, accessory ducts as well as hormones during the reproductive phase of placental primates and non-primates are called ___ and ___ respectively.

1. Oestrous cycle and menstrual cycle

2. Menstrual cycle and oestrus cycle

3. Oestrous cycle and oestrus cycle

4. Menstrual cycle and menstrual cycle

Q. Name the reproductive cycle that occur in seasonal breeders. Give an example.

Q. In non-primate mammals the cyclical changes that occur during reproductive phase are called __________.

1. menstrual cycle
2. oestrus cycle
3. puberty
4. None of the above

Q.

The _______ cycle is the main reproductive cycle of non-primate vertebrates.

Q. Read the following statements about the reproductive cycles in mammals and select the correct ones.
(i) Oestrous cycle occurs in primate mammals.
(ii) In species with oestrous cycle, females are generally sexually active during oestrous phase.
(iii) Both the cycles show monthly recurrence.

1. (i) and (ii)
2. (ii) and (iii)
3. (ii) only
4. (i), (ii) and (iii)

Q. Presence of which of the following hormones in the urine is commonly tested in the pregnancy test kits?

1. Human chorionic gonadotropin
2. Human chorionic somatomammotropin
3. Human placental lactogen
4. Relaxin

Q. Assertion :Some female animals permit copulation only during oestrous cycle. Reason: Oestrous cycle is observed in non-primate mammals.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. In which of the following organisms oestrus cycle does not take place?

1. Lion
2. Rabbit
3. Rat
4. Monkey

Q.

In which among the following set of animals, show oestrus cycle?

1. Cow, sheep, rat, deer, dog, tiger

2. Monkey, ape and man

3. Cow, monkey, ape, man, dog

4. Sheep, ape and man

Q. Which of the following needs to be replaced more frequently than others?

1. Cervical cap
2. Lippes loop
3. Copper-T
4. Progestasert

Q. Oestrous cycle is reported in

1. Cows and sheep
2. Humans and monkeys
3. Chimpanzees and gorillas
4. Humans and cows

Q. Answer the following question briefly and to the point.
Give a significant point of difference between oestrous and menstrual cycle.

Q.

In which among the following set of animals, show oestrus cycle?

1. Cow, sheep, rat, deer, dog, tiger

2. Monkey, ape and man

3. Cow, monkey, ape, man, dog

4. Sheep, ape and man

Q.

Oestrous cycle occurs in:

1. Monkey

2. Chimpanzee

3. Dog

4. Human being

Q. Estrus frequency of a goat is

1. 13 days
2. 18 days
3. 17 days
4. 21 days

Q. Identify from the following group of animals which exhibit oestrus cycle

1. Lion, deer, dog and cow
2. Cow, monkey, elephant and ape
3. Monkey, ape, man and elephant
4. Lion, dog, monkey and ape