Question

Which is correct?
(a) Gametes are invariably haploid.
(b) Spores are invariably haploid.
(c) Gametes are generally haploid.
(d). Both spores and gametes are invariably haploid.​

Answer 1

Answer:

option a is correct.

Explanation:

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Answer 2

ANSWER:-

Gametes are invariably haploid (option A)

EXPLANATION:-

Gametes are invariably haploid cells as they are produced by meiosis. Spores are formed in lower plants by mitotic division and hence they can be diploid.

Explanation:

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$\bigstar\bold{\overbrace{ \underbrace{Sexual \: Reproduction}}}$

• In animals also males and females have different reproductive parts or organs.Like plants, The Reproductive parts in animals also produce gamets that fuse to form a zygote. It is the zygote which devolops into a new individual.this type of reproduction beginning from the fusion of male and female gamets is called sexual reproduction

$\bigstar\bold{\overbrace{ \underbrace{Male \: Reproductive \: Organs}}}$

• The male reproductive organs include a pair of testes (singular,testis), two sperm ducts and a penis. The testes produce the male gamets called sperms. Millions of sperms are produced by the testes.Though the sperms are very small in size, each has a Head,Midle piece and a Tail.Indeed each sperm is a single cell with all usual cell components.

$\bigstar\bold{\overbrace{ \underbrace{Female \: Reproductive \: Organs}}}$

• The Female Reproductive Organs are a pair of ovaries,oviducts (fallopian tubes) and the uterus. The ovary produces Female gametes called ova (eggs). In human beings,a single matured egg is realsed into oviduct by one of the ovaries every month. Uterus is the part where development of baby take place. Like the sperm,an egg is also a single cell.

$\bigstar\bold{\overbrace{ \underbrace{Fertilisation }}}$

• The first step in the process of Reproduction is the fusion of a sperm and an ovum. When sperms come with contact with a egg. Such fusion of the egg and the sperms is called Fertilization.

• During Fertilization, the nuclei of the sperm and the egg fuse to form a single nucleus. This results in the formation of a fertiliesed egg or zygote.

• The process of Fertilization is the meeting of an egg cell from the mother and a sperm cell from the father. So the individuals inherits some characters from some of the mother and father.

• Fertilisation which takes place inside the female body is called Internal Fertilization.Internal Fertilization occurs in many animals including humans, cows,dogs,and hens.

• Fertilization in which the fusion of a male and female gamets take place outside the body of the female is called External Fertilization. It is common in aquatic animals such as Fish, Starfish, Frog,etc.