Which plant is heterospory?

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.

What is heterospory give an example in pteridophytes?

Selaginella and Salvinia are two examples of heterosporous pteridophytes. These pteridophytes consist of two types of spores, large spores that germinate to produce female gametophyte and small spores germinate to produce male gametes.

Is Cycas a heterosporous?

pinus and Cycas which are gymnosperms are also heterosporous.

What is Heterotrophy briefly comment on its significance give two example?

Heterospory is a phenomenon in which two kinds of spores are borne by the same plant. These spores differ in size. The smaller one is known as microspore and the larger one is known as megaspore. The microspore germinates to form the male gametophyte and the megaspore germinates to form the female gametophyte.

What do you mean by Hetrospory?

: the production of microspores and megaspores (as in seed plants)

What is Heterosporus condition?

Answer: 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 .

Do Ferns have embryos?

Many gametophytes usually grow in close proximity to each other, and in most ferns and horsetails the sperm of one gametophyte is most likely to fertilize the egg of a different gametophyte. This fertilized egg develops into an embryo, which is the beginning of the diploid sporophyte generation.

Are pteridophytes Homosporous?

Most pteridophytes are homosporous, producing one type of spore that germinates to produce a potentially bisexual gametophyte.

Does pinus show heterospory?

Heterospory is the production of two different types of spores by the sporophytes of land plants. Of all the options given in the question Selaginella, Pinus and Cycas all produce micorspores and megaspores for reproduction. However, Pteridium on the other hand is homosporous. Was this answer helpful?

Is heterospory found in Cycas and pinus?

Pinus and Cycas, which are gymnosperms, are also heterosporous.

What is heterospory give two examples?

What is heterospory? Give two examples. 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 the difference between homosporous and heterospory?

Heterospory evolved due to natural selection that favoured an increase in propagule size compared with the smaller spores of homosporous plants. Heterosporous plants, similar to anisosporic plants, produce two different sized spores in separate sporangia that develop into separate male and female gametophytes.

Which of the following is an example of heterosporous?

Give an Example. Heterospory is referred to production of two types of spores, i.e. smaller male microspores and bigger female megaspores. Gymnosperms are heterosporous, e.g. Pinus, Cycas. Pteridophytes are mostly homosporous but a few genera, e.g. Selaginella and Salvinia are heterosporous.

What is meant by heterosporous plants?

Heterosporous plants, similar to anisosporic plants, produce two different sized spores in separate sporangia that develop into separate male and female gametophytes.