Fill in the blanks:

(a) Humans reproduce _____________ (asexually/sexually)

(b) Humans are _____________ (oviparous, viviparous, ovoviviparous)

(c) Fertilisation is _____________ in humans (external/internal)

(d) Male and female gametes are _____________ (diploid/haploid)

(e) Zygote is _____________ (diploid/haploid)

(f) The process of release of ovum from a mature follicle is called _____________

(g) Ovulation is induced by a hormone called _____________

(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 foetus and uterus is called _____________

(a) sexually

Explanation: Sexual reproduction – is a process by which a new individual from two parents are formed.

(b) viviparous

Explanation: Viviparous – are those types of animals which reproduce, develop, nourishes and give birth to live young ones.

(c) internal

Explanation: Internal Fertilization - is defined as the union of an egg cell with a sperm during sexual reproduction which occurs inside the body of a parent.

(d) haploid

Explanation: Haploid gametes – human reproduce sexually which involves joining together of haploid gamete cells from each parent with half the normal number of chromosomes.

(e) diploid

Explanation: Diploid – human reproduces sexually, which involves joining of cells containing half the normal number of chromosomes from each parent to make a new cell containing exact number of chromosomes from both parents, these cells from each parent then combine to form the zygote which are also called diploid gametes.

(f) ovulation_

Explanation: Ovulation is a phase in women when the egg moves from the ovaries into fallopian tubes to attain fertilization stage.

(g) luteinizing hormone_

Explanation: Luteinizing hormone - is a hormone which is secreted by the anterior pituitary gland, whose function is to stimulate ovulation in females and synthesizes androgen in males.

(h) fertilization___

Explanation: Fertilization – is a process in which two gametes unite keeping the somatic chromosome number intact with the initiation of developing a new individual.

(i) fallopian tube_

Explanation: Fallopian tube – are tubes which carries the egg from ovary to uterus. They are two in numbers for each ovaries.

(j) blastocyst

Explanation: Blastocyst – during the early development of mammals astructure is formed called blatocyst, which possesses an inner cell mass (ICM) that forms the embryo.

(k) placenta

Explanation: Placenta – is an organ which connects mother and the fetus internally, it connets to the uterine wall to allow uptake of nutrients, thermo-regulation, waste elimination and gas exchange through mother’s blood, it also fights internal infection and produces hormones which supports the pregnancy. The unbillical cord develops from placenta.