Answer:
The differences between oestrus and
menstrual cycle-are as follows
(b)
the differences between ovipary and vivipary are as follows.
Oestrus cycle
Menstrual cycle
1. The cyclic changes in the activities of
ovaries and accessory ducts as well as hormones during the reproductive phase
of non-primate mammals is called oestrus cycle.
2. Female show strong irresistible sexual urge.
3. there is estrus/heat production at the time of
ovulation and copulation occurs only at that period
4. The shedding of endometrium and bleeding do
not occur. E.g., cows, sheep, rats, deers, dogs and tigers etc.
1. The cyclic changes in the activities of
ovaries and accessory ducts as well as hormones during the reproductive phase
of primate mammals is called menstrual cycle.
2. Female do not show irresistible sexual urge.
3. There is no heat period and copulation occurs
during any time of the cycle.
4. The shedding of endometrium and bleeding
occurs. E.g., monkeys, apes and humans.
Ovipary
Vivipary
1. In ovipary animals lay eggs.
2. The eggs are covered by hard calcareous shell.
3. The development of zygote takes place outside
the female?s body
4. Female?s lay eggs in a safe place in the
environment, but the chances of survival are less e.g., all bird, most of
reptiles are egg laying mammals.
1. In vivipary animals gives birth to
young one
2. Ovumare not covered by calcareous
shell.
3. The development of zygote takes
place inside the female?s body
4. Female?s deliver young ones and the
chance of survival are more.
e.g., mammals except monotremes egg
laying mammals.
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