rn Differentiate between (a) oestrus and menstrual cycles; (b) ovipary and vivipary. Cite an example for each type.
a)
| Oestrus cycle | Menstrual cycles |
1 | These are recurring physiologic changes that occur in non primates females (cow, dog). | These are cyclic physiologic changes that occur in primates females (human, apes). |
2 | Oestrous cycles continue until death. | It ends at certain age of life. In human it is at 45 -55 years of age. |
3 | No or negligible bleeding takes place from vagina of female. | Profound bleeding takes place from female vagina. |
4 | The animals in which Oestrous cycles takes place are sexually reproductive for restricted period of time in a year which is known as the breeding season. | The female are sexually reproductive throughout the year. |
b)
| Ovipary | Vivipary |
1 | Laying eggs that hatch and give birth to young ones. | (of an animal) it is bringing forth live young ones that have developed inside the body of the parent. (of a plant) Reproducing from buds that form plantlets while still attached to the parent plant, or from seeds that germinate within the. |
2 | Birds, snake are examples of ovipary. | Humans, dog, mangroves trees are examples of vivipary. |
3 | Both internal and external type of fertilization leads to ovipary. | Only internal fertilization leads to vivipary. |