The modern day animals and their ancient fossils are listed in the following table.
Animal |
Fossil |
|
1. |
Man |
Ramapithecus |
2. |
Horse |
Eohippus |
3. |
Dog |
Leptocyon |
4. |
Camel |
Protylopus |
5. |
Elephant |
Moerithers |
6. |
Whale |
Protocetus |
7. |
Fish |
Arandaspis |
8. |
Tetrapods |
Icthyostega |
9. |
Bat |
Archaeonycteris |
10. |
Giraffe |
Palaeotragus |
Practise drawing various animals and plants.
Fill in the blanks:
(a) Humans reproduce __________. (asexually/sexually)
(b) Humans are__________. (oviparous/viviparous/ovoviviparous)
(c) Fertilization is __________ in humans. (external/internal)
(d) Male and female gametes are __________. (diploid/haploid)
(e) Zygote is __________. (diploid/haploid)
(f) The process of release of the ovum from a mature follicle is called__________.
(g) Ovulation is induced by a hormone called the __________.
(h) The fusion of male and female gametes is called _____________.
(i) Fertilisation takes place in _____________.
(j) Zygote divides to form _____________which is implanted in uterus.
(k) The structure which provides vascular connection between fetus and uterus is called ____________.
Ty