DEVELOPMENT OF ZYGOTE IN FLOWERING PLANTS
DEVELOPMENT OF ZYGOTE IN FLOWERING PLANTS, GERMINATION OF SEEDS, ADAPTIVE FEATURES IN A DEVELOPING ANIMAL DEVELOPMENT OF ZYGOTE IN PLANTS… Read More »DEVELOPMENT OF ZYGOTE IN FLOWERING PLANTS
DEVELOPMENT OF NEW ORGANISMS
COURTSHIP BEHAVIOURS IN ANIMALS Courtship is a reproductive communication between males and females of a species that ends in sexual… Read More »DEVELOPMENT OF NEW ORGANISMS
ORGAN OF HEARING, SMELL AND TASTE
THE ORGAN OF HEARING Mammals have two ears on each side of the head. The greater part of it is… Read More »ORGAN OF HEARING, SMELL AND TASTE
SENSE ORGANS
SENSORY RECEPTORS All living organisms respond to changes in their environment (stimuli). These changes can be mechanical, electromagnetic, chemical or… Read More »SENSE ORGANS
REFLEX, VOLUNTARY ACTIONS AND CONDITIONAL REFLEXES
REFLEX AND VOLUNTARY ACTIONS Actions are responses to stimuli. These actions are grouped into two: involuntary (reflex) and voluntary actions.… Read More »REFLEX, VOLUNTARY ACTIONS AND CONDITIONAL REFLEXES
THE PERIPHERAL NERVOUS SYSTEM
THE PERIPHERAL NERVOUS SYSTEM These include the sensory system (receptor and nerves leading from all parts of the body to… Read More »THE PERIPHERAL NERVOUS SYSTEM
NERVOUS CO-ORDINATION
THE NERVOUS SYSTEM The nervous and hormonal systems co-ordinate various biological activities in the body of multicellular animals, the basic… Read More »NERVOUS CO-ORDINATION
HORMONAL CO-ORDINATION
HORMONES AND ENDOCRINE GLANDS Hormones are chemical substances produced or secreted by endocrine glands (ductless glands) in response to various… Read More »HORMONAL CO-ORDINATION
LIVER AND SKIN: STRUCTURE, FUNCTIONS, DISEASES AND CARE
STRUCTURE OF THE LIVER The liver is the largest organ in the body of a mammal with a weight of… Read More »LIVER AND SKIN: STRUCTURE, FUNCTIONS, DISEASES AND CARE
REGULATION OF INTERNAL ENVIRONMENT
HOMEOSTASIS Homeostasis is the process by which a fairly constant internal environment is maintained in an organism. The internal environment… Read More »REGULATION OF INTERNAL ENVIRONMENT