2 Evidence indicates that the evolution of vascular tissue c

2. Evidence indicates that the evolution of vascular tissue coincided with a five fold drop in atmospheric CO2 levelsduring the Carboniferous period, causing global cooling that resulted in widespread glacier formation. What is apossible explanation for this?

Table 14.4-Structures and Functions ofthe Nonvascular Plants and Seedless Vascular Plants Function Sporophyte/Gametophyte Structure Antheridium RACOheEstoum. Spore Gamete Rhizome Gemma Sporangium Sori Example

Solution

1.

Antheridium

Function- supports and protects the tissue.

Gamtophyte

Example- Bryphyte

Archegonium

Function- produces and holds the ovum and is a female counterpart of antheridium.

Gamtophyte

Example- Thallus

Spore

Function- Germination

Sporophyte

Example- Quillworts

Gamete

Function- Fusion and carrier of genetic information.

Gametophyte

Example- ovum

Rhizome

Function- helps in propagation of plants

sporophyte

Example- Ginger

Gemma

Function- responsible for giving rise to new gametophytes

Gametophyte

Example- Liverworts

Sporangium

Function- Providing place for the formation of spores.

Sporophyte

Example-Mosses

Sori

Function- It produces and contains spores

Sporopphyte

Example- Lichen

2. Vascular tissue by virtue of being a complex conducting tissue. With the evolution there was an increased stomata which raised the budget of nutrients, thus more consumption of CO2 from the atmosphere to prepare food and conducting the minerals and water to different parts.