DEFINITIONS AND KEY POINTS FOR OBJECTIVES OF PTERIDOPHYTA
DEFINITIONS AND KEY POINTS FOR OBJECTIVES OF PTERIDOPHYTA ---------------------------- ----------------------------
Biology Concepts and Articles
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Gymnosperms life cycle , Cones , Fertilization , Affinities & Classification
GYMNOSPERM Occurrence Gymnosperms are naked seeded plants. Gynmosperms are a group of ancient plants. They become dominant in the Jurassic period Most of the gymnosperms are evergreen trees. Some shrubby pl..flas are also found in this group. They have worldwide distribution. They are most
Seed Habit its history ,evolution & Lineages
SEED HABIT A seed consists of an embryo, stored food and a seed coat. The seed habit is the most complex and evolutionary successful method of sexual reproduction. It is found in vascular pIants. Today, seed plants, gymnosperms and angiosperms flowering plants are the
Pteropsida (FERNS) – TYPE III Polypodium – Occurrence & Structure
PTEROPSIDA (FERNS) TYPE III POLYPODIUM Occurrence Polypodium is a perennial herb. It is found mostly in temperate regions. It has worldwide distribution. Mostly is attached to some rocks. But some forms are epiphytic. General structure The plant body is sporophyte. Plant body is divided
Answer of Question of Temperature & Body Fluid Regulation
Answer of Question of Temperature & Body Fluid Regulation
PTEROPSIDA (FERNS)
PTEROPSIDA (FERNS) TYPE II MARSILEA (Water fern) Occurrence Marsilea is an aquatic or semi aquatic plant. It is common in the temperate regions. It groNA in fresh water ponds and ditches in Punjab. Marsilea quadrifolia and Munilea minuta are commonly found in Pakistan. General
Answer of Question of Temperature & Body Fluid Regulation
Answer of Question of Temperature & Body Fluid Regulation
Chapter 9 Zoology Past Papers
Chapter 9 Zoology Past Papers
Structure of Leaf
STRUCTURE OF LEAF Different groups of plants hake different variations in the internal structure or foliage leaves. Hie leaves show different evolutionary adaptations for different environmental conditions. The leaf tissues are divided into three fundamental systems. These are epidermal. mesophyll and vascular tissues. (a)
SECONDARY GROWTH IN STEM
SECONDARY GROWTH IN STEM The stem increases in thickness In secondary growth. Secondary growth increases the vascular tissues. Therefore, it increases the thickness of flue stein. Secondary growth is common in gymnosperms and woody dicots. But it is generally absent in most of the