This document discusses various biological processes involving changes in form, including metamorphosis, regeneration, and aging. Metamorphosis refers to how organisms develop and change form, such as insects undergoing complete metamorphosis from egg to larva to pupa to adult. Regeneration involves regrowing lost or damaged body parts, seen in organisms like hydra, starfish, and salamanders. Aging is the process of accumulating changes over time that affects organisms physically, psychologically, and at cellular levels. Environmental factors and lifestyle choices can influence the aging process.
this presentation includes morphological and biochemical changes that takes place during amphibian metamorphosis. it also includes hormonal control and coordination during metamorphosis.
scott gilbert 6th edition is a very good book for this topic.
also available on net on ncbi site
happy studying :)
Iczn(The International Commission on Zoological Nomenclature )Al Nahian Avro
The International Commission on Zoological Nomenclature (ICZN) acts as adviser and arbiter for the zoological community by generating and disseminating information on the correct use of the scientific names of animals. The ICZN is responsible for producing the International Code of Zoological Nomenclature - a set of rules for the naming of animals and the resolution of nomenclatural problems.
looking after the eggs or young until they are independent to defend from predators is known as parental care.
Amphibians show great diversity in Parental care.
When a perfectly harmless animal resembles in its colour and shape, with a well protected species, the phenomenon is called mimicry.
The concept of mimicry was first given by H. W. Bates in 1862.
Mimicry is an important feature of organism which protect the animals against enemies. Mimicry often used as self defense which increases the survival value of organisms.
Taxonomic Collections, Preservation and Curating of InsectsKamlesh Patel
Taxonomy: Taxonomy is the science of defining and naming groups of biological organisms on the basis of shared characteristics.
The classification of organisms is according to hierarchal system or in taxonomic ranks (eg; domain, kingdom, phylum class, order, family, genus and species) based on phylogenetic relationship established by genetic analysis.
Taxonomic Collection : Biological collection are typically preserved plant or animals specimens along with specimen documentations such as labels and notations.
Dry Collection - Dry collections consist of those specimens that are preserved in a dry state.
Wet Collection - Wet collections are specimens kept in a liquid preservative to prevent their deterioration.
this presentation includes morphological and biochemical changes that takes place during amphibian metamorphosis. it also includes hormonal control and coordination during metamorphosis.
scott gilbert 6th edition is a very good book for this topic.
also available on net on ncbi site
happy studying :)
Iczn(The International Commission on Zoological Nomenclature )Al Nahian Avro
The International Commission on Zoological Nomenclature (ICZN) acts as adviser and arbiter for the zoological community by generating and disseminating information on the correct use of the scientific names of animals. The ICZN is responsible for producing the International Code of Zoological Nomenclature - a set of rules for the naming of animals and the resolution of nomenclatural problems.
looking after the eggs or young until they are independent to defend from predators is known as parental care.
Amphibians show great diversity in Parental care.
When a perfectly harmless animal resembles in its colour and shape, with a well protected species, the phenomenon is called mimicry.
The concept of mimicry was first given by H. W. Bates in 1862.
Mimicry is an important feature of organism which protect the animals against enemies. Mimicry often used as self defense which increases the survival value of organisms.
Taxonomic Collections, Preservation and Curating of InsectsKamlesh Patel
Taxonomy: Taxonomy is the science of defining and naming groups of biological organisms on the basis of shared characteristics.
The classification of organisms is according to hierarchal system or in taxonomic ranks (eg; domain, kingdom, phylum class, order, family, genus and species) based on phylogenetic relationship established by genetic analysis.
Taxonomic Collection : Biological collection are typically preserved plant or animals specimens along with specimen documentations such as labels and notations.
Dry Collection - Dry collections consist of those specimens that are preserved in a dry state.
Wet Collection - Wet collections are specimens kept in a liquid preservative to prevent their deterioration.
This presentation explores a brief idea about the structural and functional attributes of nucleotides, the structure and function of genetic materials along with the impact of UV rays and pH upon them.
Nucleophilic Addition of carbonyl compounds.pptxSSR02
Nucleophilic addition is the most important reaction of carbonyls. Not just aldehydes and ketones, but also carboxylic acid derivatives in general.
Carbonyls undergo addition reactions with a large range of nucleophiles.
Comparing the relative basicity of the nucleophile and the product is extremely helpful in determining how reversible the addition reaction is. Reactions with Grignards and hydrides are irreversible. Reactions with weak bases like halides and carboxylates generally don’t happen.
Electronic effects (inductive effects, electron donation) have a large impact on reactivity.
Large groups adjacent to the carbonyl will slow the rate of reaction.
Neutral nucleophiles can also add to carbonyls, although their additions are generally slower and more reversible. Acid catalysis is sometimes employed to increase the rate of addition.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
DERIVATION OF MODIFIED BERNOULLI EQUATION WITH VISCOUS EFFECTS AND TERMINAL V...Wasswaderrick3
In this book, we use conservation of energy techniques on a fluid element to derive the Modified Bernoulli equation of flow with viscous or friction effects. We derive the general equation of flow/ velocity and then from this we derive the Pouiselle flow equation, the transition flow equation and the turbulent flow equation. In the situations where there are no viscous effects , the equation reduces to the Bernoulli equation. From experimental results, we are able to include other terms in the Bernoulli equation. We also look at cases where pressure gradients exist. We use the Modified Bernoulli equation to derive equations of flow rate for pipes of different cross sectional areas connected together. We also extend our techniques of energy conservation to a sphere falling in a viscous medium under the effect of gravity. We demonstrate Stokes equation of terminal velocity and turbulent flow equation. We look at a way of calculating the time taken for a body to fall in a viscous medium. We also look at the general equation of terminal velocity.
ANAMOLOUS SECONDARY GROWTH IN DICOT ROOTS.pptxRASHMI M G
Abnormal or anomalous secondary growth in plants. It defines secondary growth as an increase in plant girth due to vascular cambium or cork cambium. Anomalous secondary growth does not follow the normal pattern of a single vascular cambium producing xylem internally and phloem externally.
ESR spectroscopy in liquid food and beverages.pptxPRIYANKA PATEL
With increasing population, people need to rely on packaged food stuffs. Packaging of food materials requires the preservation of food. There are various methods for the treatment of food to preserve them and irradiation treatment of food is one of them. It is the most common and the most harmless method for the food preservation as it does not alter the necessary micronutrients of food materials. Although irradiated food doesn’t cause any harm to the human health but still the quality assessment of food is required to provide consumers with necessary information about the food. ESR spectroscopy is the most sophisticated way to investigate the quality of the food and the free radicals induced during the processing of the food. ESR spin trapping technique is useful for the detection of highly unstable radicals in the food. The antioxidant capability of liquid food and beverages in mainly performed by spin trapping technique.
2. Metamorphosis
Means “change of form” in greek
Metamorphosis refers to the way that certain organisms
develop grow, and change form.
3. Insects
invertebrate animal of the class Insecta of the phylum
Arthropoda
. Like other arthropods, an insect has a hard outer covering, or
exoskeleton, a segmented body, and jointed legs. Adult insects
typically have wings and are the only flying invertebrates.
Make up about 75% of the animal world
Their bodies are divided into 3 regions: head, thorax, and
abdomen
5. Diapause
This is the suspension of development that can occur
at the embryonic, larval, pupal, or adult stage,
depending on the species
6. 2 forms of development
1. Incomplete
- it has three stages
- egg --> nymph --> adult
- at each stage, the insects looks much the same as it
becomes an adult
7.
8. 2 Forms of Development
2. Complete
- there are 4 stages of development
- egg --> larvae --> pupae --> adult
11. Environmental Influences
Amphibians – “double life in greek
Environmental factors include temperature, food
levels, tadpole densities, pond evaporation rates &
predator presence such that: increasing temperature,
decreasing food, overcrowding, pond evaporation &
increase in predation all accelerate metamorphosis
Transition from larva to adults involves precisely
controlled gene regulatory events that occur at specific
stages during development
12. Regeneration
Regeneration is the sequence of morphogenetic events
that restores the normal structure of an organ after its
partial or total amputation.
This has been studied in organisms including hydra,
starfish, zerbafish, newt, mouse, and human.
The human liver is one of the few glands in the body that
has the ability to regenerate from as little at 25% of it’s
tissue.
http://www.tutorvista.com/content/biology/biology-
iv/growth-regeneration-ageing/regeneration.php
13. Types of Regeneration
1. Physiological Regeneration
There is a constant loss of many kinds of calls due to
wear and tear caused by day-to-day activities. The
replacement of these cells is known as physiological
regeneration
Example:
Replacement of Epidermal Cells on the Skin
Replacement of R.B.C's
14. Types or Regeneration
2. Reparative Regeneration
This is the replacement of lost parts or repair of damaged
body organs. In this type of regeneration, wound is repaired
or closed by the expansion of the adjoining epidermis over
the wound.
Example:
Regeneration of limbs in salamanders
Regeneration of lost tail in lizard
Healing of wound
Replacement of damaged cells.
15. Types of Regeneration
3. Autonomy
In some animals like starfish, some part of the body is
broken off on being threatened by a predator. This
phenomenon of self-mutilation of the body is called
autotomy
Example:
Crabs break off their leg on approaching of the enemy
Holothurians throw off their internal viscera
Starfish breaks off an arm
16. 2Types of Regeneration based on
Cellular Mechanism
1. Epimorphosis or epimorphic regeneration :
This type of regeneration involves dedifferentiation of
adult structures in order to form an undifferentiated
mass of cells, or addition of parts to remaining pieces .
For example: limb generation in amphibians
18. 2. Morpholaxis or morphollactic regeneration:
In this type, regeneration occurs mainly by the remodelling
of existing tissues and the re-establishment of
boundaries, thus involving very little new growth. As a
result, the regenerated individual is much smaller
initially. It subsequently increases its size and becomes
normal after feeding. This type of regeneration is known
as morphallaxis or morphallactic regeneration.
Example: Hydra, planaria and other invertebrates e.g.
regeneration of the new individual from body pieces.
19. Regeneration in Invertebrates
A planarian, hydra, and a starfish all show remarkable
powers of regeneration. When parts are removed or a
small fragment isolated. A whole animal can be
regenerated.
20. Aging
Aging is a pattern of life changes that occurs as one
grows older. It is a process that accumulates changes in
organisms or objects over time. Human aging process
involves, psychological, cultural and social levels.
22. Biological changes
Gerontology – study of aging and the elderly
Physical Changes – predictable graying hair, wrinkles,
loss of height & weight, decline in strength and vitality
and sensory changes. Odds of chronic illness and life
threatening conditions rise steady
A majority of those people over 65 report good health
“well-to-do” people have it better since they can afford
preventive care
23. Psychological Changes
The elderly can become more introspective / more
“self-awareness”
Major shifts in personalities do not normally take place
24. Factors that add to the Effects of
Aging
1. Ultraviolet light – UV light destroys collagen and
elastic fibers in the skin, without which your skin
starts sagging and wrinkling.
2. Smoking – worsens the process of wrinkling by
affecting the blood supply to the skin and other parts
of the body.
25. Aging Process
1. Cellular Changes
Cellular multiplication slows down with age. The rate of
T-lymphocytes of the immune system decreases with age.
2. Genetic Factors
The genes associated with the mechanisms of
programmed cells death(apoptosis) also affects aging in
individuals.
3. Environmental Factors
Environmental stress associated with exposure to
excessive heat and light trigger the activity of aging
genes. Constant exposure to toxins and poisons
accentuate the aging process.
26. 4. Health Conditions
There are certain genetic disorders that completely
change the phenotype of an individual
5. Unhealthy Lifestyle
Aging process in men is mainly brought about by over
consumption of alcohol and heavy smoking. Lack of
exercise, inadequate rest or sleep, mental stress show
symptoms of early aging. Other factors like regular
consumption of excessive spicy food and caffeine
renders and old look. Sloth and sluggish lifestyle
makes one feel old.
Editor's Notes
The change of shape or characteristics of an organism’s body as it grows and matures.
In some species, diapause occurs when induced by environmental conditions, in some it is part of their life cycle.
Female cockroach lays an egg..when the egg hatches…there is a larvae and it goes through different nymph stages until it becomes an adult.
Frogs undergo a different type of Complete Metamorphosis.From the egg emerges a tadpole, which lives in the water, breathes with gills, and has a tail. As a tadpole grows, lungs and legs form, and the gills and tail are absorbed into the body. Finally, the animal leaves the water and lives mainly on land, as a frog.
The mammalian liver can regenerate if a part is removed. The antlers of a male deer can also regenerateThe emperior newt can also regenerate it’s dorsal crest, retina and lens, jaw and tail.
Gerontology – study of aging and the elderlyPhysical Changes – predictable graying hair, wrinkles, loss of height & weight, decline in strength and vitality and sensory changes. Odds of chronic illnesss and life threatening conditions rise steady
Smiling, Squinting and frowning other facial movements also cause wrinkles
This makes the body susceptible to illness and diseases