Notesale: Turn your study into money

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1
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A
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Warfarin is a drug used in humans to prevent blood clotting that
was first used as rodenticides in the 1950s
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More detailed genetic studies showed that the
‘super’ mouse was a German house mouse (Mus musculus domesticus) and
while they may not look any different from any other house mice, they carry a
DNA from Algerian mice (Mus spretus) - species that are naturally resistant to
Warfarin - on chromosome 7
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Evolution of Cave-Dwelling fish that lost its eyes
The blind forms of Mexican tetra (Astynax mexicanus) have evolved in
caves
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Researchers have
found that not only are they going blind, but they are also losing the part of their
brain that is associated with vision while the areas that control touch and smell
are getting bigger
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C
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Based on the study published in Journal Nature
Communications, the number of brown owls is increasing
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But as winter becomes milder, grey-feathered
Tawny owls are likely to disappear; natural selection is favoring feathers that
camouflage with the brown forest than the snow
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Patrick Karell from the
University of Helinski said that brown owls, which used to form 30% of the Tawny
owl population of Finland, now make up 50%
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Evolution of whales from land to sea
Cetaceans (whales, dolphins, and porpoises) originated from land
mammals
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Whales evolved from four-legged,
even-toed, hoofed ancestors that lived on the land about 50 million years ago
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The theory of this evolution is that some land-living ungulates
favored munching on plants at the water’s edge which is an advantage for them
to easily hide from danger in shallow water
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Their front legs became flippers

and a thick layer of fat called blubber replaced their fur coats to keep them warm
and streamlined
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Gradually, their nostrils moved to the top
of their head for them to breathe easily without the need to tilt their head while
swimming
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Evolution of the Blue-Moon Butterfly
In 2001, the male population of the Blue-moon butterfly on South Pacific
ISland drop to one percent
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The likely reason for the dramatic
decrease in the male population of the said butterfly was the Wolbachia, a
male-killing parasite that lives in the butterfly’s reproductive cells, preferably
female sex cells
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Lab experiments showed that Wolbachia did not
evolve and is still present in both male and female butterflies
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2
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Commensalism,
ammensalism, mutualism, neutralism, predation, and competition
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Parasitism
a
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Entomophagous parasites and larva and young insects
c
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Commensalism
a
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Sharks and Remora Fish
c
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Ammensalism
a
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When cattle trample on the grass
c
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Mutualism
a
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Bees and flowers
c
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Neutralism
a
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Rainbow trout and dandelion
F
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House cats (predator) and mice (prey)
b
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Seagulls (Predator) sweeping into the sea to catch small fish (prey)

G
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Cheetah and lions as they feed on prey
b
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Goats and cows in the same place
3

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