Difference Between Homospory and Heterospory

The main difference between homospory and heterospory is that the homospory is the production of a single type of spores with the same size whereas the heterospory is the production of two types of spores, megaspores and microspores, with different sizes.

1. What do you mean by Homosporous and Heterosporous Pteridophytes?
2. What is Heterospory give two example?
3. How does the haploid stage of Homosporous and Heterosporous plants differ?
4. What are Homosporous Pteridophytes?
5. What is Heterosporous condition?
6. Is dryopteris Homosporous or Heterosporous?
7. What is Heterospory explain?
8. What is Heterospory briefly?
9. In which plant is Heterospory present?
10. Are Sporophytes haploid?
11. What are the two types of Gametophytes?
12. What plants have Gametangia?

What do you mean by Homosporous and Heterosporous Pteridophytes?

Homosporous pteridophytes refer to the pteridophytes that produce only one type of spores that are not separated by sex while heterosporous pteridophytes refer to the pteridophytes which produce two types of spores separated by sex.

What is Heterospory give two example?

Heterospory is the phenomenon of formation of two types of spores, i.e., smaller microspore and larger megaspore. ... Examples of heterospory are Selaginella, Salvinia and Marsilea, etc.

How does the haploid stage of Homosporous and Heterosporous plants differ?

Homosporous plants produce one type of spore which develops into a gametophyte (1n) with both male and female organs. Heterosporous plants produce separate male and female gametophytes, which produce sperm and eggs, respectively.

What are Homosporous Pteridophytes?

Homosporous Pteridophytes are pteridophytes that produce only one type of spores that are not separated by sex. The spore contains both male and female parts. Homosporous pteridophytes produce only one type of spores which are small in size. Only one type of sporangia occurs in Homosporous pteridophytes.

What is Heterosporous condition?

A heterosporous life history occurs in some pteridophytes and in all seed plants. It is characterized by morphologically dissimilar spores produced from two types of sporangia: microspores, or male spores, and megaspores (macrospores), or female spores.

Is dryopteris Homosporous or Heterosporous?

Dryopteris is homosporous and 32-64 haploid spores are produced in each sporangium. Adiantum is also homosporous. The spores are the pioneer structures of the gametophytic generation.

What is Heterospory explain?

Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants. The smaller of these, the microspore, is male and the larger megaspore is female.

What is Heterospory briefly?

Heterospory is the phenomenon in which two different kinds spores are produced. These spores differ in size. The smaller spore is called microspore while the larger spore is called megaspore. ... The heterospory is the first step of evolution of seed development in gymnosperms and angiosperms.

In which plant is Heterospory present?

Heterospory means the formation of two distinctly different spores. The smaller one, designated as microspore later on gives rise to the male gametophyte and the larger one called megaspore gives rise to female gametophyte. Heterospory commonly occurs in all gymnosperms and certain pteridophytes such as Selaginella.

Are Sporophytes haploid?

The sexual phase, called the gametophyte generation, produces gametes, or sex cells, and the asexual phase, or sporophyte generation, produces spores asexually. In terms of chromosomes, the gametophyte is haploid (has a single set of chromosomes), and the sporophyte is diploid (has a double set).

What are the two types of Gametophytes?

These spores develop into two distinct types of gametophytes; one type produces sperm and the other produces eggs. The male gametophyte develops reproductive organs called antheridia (produce sperm) and the female gametophyte develops archegonia (produce eggs).

What plants have Gametangia?

Unsourced material may be challenged and removed. A gametangium (plural: gametangia) is an organ or cell in which gametes are produced that is found in many multicellular protists, algae, fungi, and the gametophytes of plants.