A capsicum flower has 240 ovules in its ovary. But it produces a fruit with only 180 viable seeds.
Explain giving a reason that could be respnsible for such a result
Ovules develop into viable seeds which are capable of germination under suitable environmental conditions. Viability is influenced by various conditions like humidity, temperature and availability of oxygen. Viability can be lost due to:
1 Exhausation of food around the embryo
2. damage to embryo
3. denaturation of enzymes
4 extremely high temperatures
5. excessively dry weather
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