Unit 1 bio v1

INTRODUCTION Chordates are animals in which notochord is present. Notochord is a flexible rod-like structure of mesodermal origin, that serves …

INTRODUCTION Non-chordates are animals lacking a Notochord. Notochord is a rod-like elastic structure which gives rise to the vertebral column. …

INTRODUCTION Kingdom Animalia includes approximately 1.2 million species of multi-cellular animals. GENERAL CHARACTERISTICS OF ANIMALIA All organisms included in Kingdom …

WHAT IS ANGIOSPERMS? Angion means Vessel, and Sperma means Seed. So, Angiosperms means seeds within vessel. The seeds of angiosperms …

WHAT IS GYMNOSPERMS? Gymno means Naked, and Sperma means Seed. So, Gymnosperms means naked seed. Gymnosperms have evolved much earlier …

INTRODUCTION The term Pteridophyte is derived from two words ‘Pteron’ meaning “feather” and ‘phyton’ meaning “plant”. Pteridophytes are the first …

Introduction Bryophytes belong to cryptograms which are nonvascular seedless plants. They have approximately 20,000 known species and are widely distributed …

INTRODUCTION Algae comprise a diverse group of non-flowering, photosynthetic and oxygen-producing plants that lack typical plant structures i.e. roots, stem, leaves. …

WHAT IS PLANTAE?

• Plantae is the kingdom which constitutes all the plants present on the earth.
• With more than 250,000 species, they are the second largest group in sizeafter Arthropoda.
• There are a wide variety in shapes and sizes of plants…….
  

WHAT IS VIRUS

• About a century ago the word “virus” was generally referred to as a poison associated with disease and death.
• The present status of virus is completely different.
• Now viruses are known as particles of nucleic acid often with a protein coat.
• Viruses are defined as non-cellular infectious entities…..