1) The document discusses biological diversity and interdependence between species within an ecosystem. It defines key terms like niche and different types of symbiotic relationships between species like mutualism, commensalism, and parasitism.
2) Species can coexist in the same habitat through resource partitioning, where they divide resources like occupying different areas of the same tree or feeding on different parts of the tree.
3) Variation within species enables closely related organisms to survive in the same ecosystem by occupying different niches.
In biology and ecology, extinction is the termination of an organism or of a group of organisms normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost at this point.
In biology and ecology, extinction is the termination of an organism or of a group of organisms normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost at this point.
FEATURING THE SUMMARY OF SCIENCE 10 UNIT 3 MODULE 3
GEOLOGIC TIME SCALE
THEORIES OF EVOLUTION
BIODIVERSITY
FOSSILS
RELATIVE DATING METHOD
RADIOMETRIC DATING METHOD
HOMOLOGOUS
ANALOGOUS
THEORY OF NATURAL SELECTION
FEATURING THE SUMMARY OF SCIENCE 10 UNIT 3 MODULE 3
GEOLOGIC TIME SCALE
THEORIES OF EVOLUTION
BIODIVERSITY
FOSSILS
RELATIVE DATING METHOD
RADIOMETRIC DATING METHOD
HOMOLOGOUS
ANALOGOUS
THEORY OF NATURAL SELECTION
Describe three different symbiotic relationships, with examples. Whi.pdfseamusschwaabl99557
Describe three different symbiotic relationships, with examples. Which relationship produces the
most coevolution? Explain.
Please type the answer. Type the answer in your own words please. no copying from the internet
has to be in own words
Solution
Three different types of symbiotic relatioships are :
1. Mutualism
2. Commensalism
3. Parasitism
1.Mutualism is the relationship between organisms where both are benefitted from each other.
Examples of mutualism:
a. Oxpecker on zebra eats pest. Oxpecker gets food and zebra gets rid of pest.
b. Shape of flower and structure of pollinator is also an example of mutulism as shape of the
flower is specific for the pollinator to allow pollination.
c. Bacteria in gut of human intestine benefit human by partially digesting the food difficult to
digest. Bacteria gets food through this and human is able to digest tougher to dogest food.
d. Mycorhhiza is association between fungus and gymnosperm root. Plant gets benefitted by
collection of nutrients from soil and fungus gets benefit by plant in form of food and shelter.
2. Commensalism: In commensalism association, one organism is benefitted whereas other is not
affected at all.
examples:
a. Cattle Egret and cattle: as cattle grazes and uproots plants, insects that escape are eaten by
egret. Egret gets the benefit wheras cattle is not affected.
b Sucker fish attaches itself to the shark and travels along. Shark doesnt get affected whereas the
sucker fish gets left over food of shark.
c.Epiphytes are plants that grow on larger trees. They just climb the trees for receiving sunlight
and do not cause any affect to the plant.
d. CLown fish lives in tentacles of Sea anemones. Sea anemone doesnt get affected whereas
clown fish gets the advantage of protection from predators.
3. Parasitism: In this relationship, the parasite harms the host to derive the benefit in terms of
food or shelter or both. In this type of relationship one species is harmed whereas other is
benefitted.
examples of parasitism:
a. Lice on Human body: Lice sucks blood can causes harm to human.
b. Cuscuta causes harm to higher plants by living on it and taking the benefit of food and shelter.
c. Ascaris lives in human intestine . It benefits from receiving food and shelter and causes harm
to human.
d. tapeworm in Human intestine as they get partially digested food and deprive human of
nutrients.
Out of these relationships, coevolution is most important for species showing mutualistic
behaviour as:
1. They both have large dependency on each other for their survival.
2. Any change in one species can lead to extinction of the other. Coevolution is the only strategy
for their survival..
Science8 Unit C Lightand Optics Section2 Lesson3 Raysand ReflectionShorin
Ray diagrams
Intensity of Light
Transparent
Translucent
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Luminous
Non-Luminous
Regular Reflection
Diffuse Reflection
Incident Rays
Plane Mirrors
Normal
Angle of Incidence
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