Rearrange the human activities mentioned below as per the order in which they developed after the modern Homo sapiens came into existence during ice age:
1. Human settlement
2. Prehistoric cave art
3. Agriculture
After the modern Homo sapiens came into existence, the given human activities developed in the following manner:
1) Prehistoric cave art developed around 18000 years ago.
2) Agriculture started around 10000 years ago.
3) Then human settlement started
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 ____________.
Explain the following terms with example
(a) Co-dominance
(b) Incomplete dominance