Write the Caytonealian theory on originof angiosperms.

1.	Write the Caytonealian theory on originof angiosperms.
Answer» The Caytonialean Theory: This theory was proposed by H. Hamshaw Thomas on the basis of comparative studies of modern flowering plants, with those of Caytoniales, which are certain fossil plants of the middle Jurassic. This theory was later supported by Stebbins. Caytonia had a wide distribution and it has been described from Triassic to Cretaceous localities in most of today’s Northern Hemisphere. It is believed to have been a small tree, based on association of foliage with woody axis. Caytoniales, which seems to have a few angiosperm-like features, are looked upon as the possible ancestors of angiosperms.

Answer»

The Caytonialean Theory:

This theory was proposed by H. Hamshaw Thomas on the basis of comparative studies of modern flowering plants, with those of Caytoniales, which are certain fossil plants of the middle Jurassic. This theory was later supported by Stebbins.

Caytonia had a wide distribution and it has been described from Triassic to Cretaceous localities in most of today’s Northern Hemisphere. It is believed to have been a small tree, based on association of foliage with woody axis. Caytoniales, which seems to have a few angiosperm-like features, are looked upon as the possible ancestors of angiosperms.

Discussion

No Comment Found

Related InterviewSolutions

Hence, the bisectors of a linear pair are at right aintersedt at O. If 4X0L 4LOP b,find the value of5 In the given figure lines XY and LMIt is given that a:b 23.
What is particulate matter ? How it leads to global warming ?
Bile juice can emulsify fats because it contains(1) Cholesterol(3) Bile pigments(2) Bile salts(4) Enzymes
Mr. Kumar is suffering from high blood cholesterol. Name a beneficial microbe thatcan be used to treat his condition.B.
12. Find out the name of the microbes from which Cyclosporin A (animmunosuppressive drug) and Statins (blood cholesterol loweringagents) are obtained.
List the medicinal importance of honey.
G) A high-level language is also known aslike language.
1. A young green plant receives sunlight fromone direction only. What will happen to itsshoots and rootst2. Write any two applications of bio-gas.
Material of Nucleus is stained by
(a) 4, 8, 12, 16 (b) 12. 16, 20, 24(c) 10, 12, 14, 16 (d) 2, 4, 6. 8