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That large scale of use of silkworms for making silk can lead to extinction of silkworm why or why not?
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Where was silkworms first found?
The silkworm is the larva or caterpillar of the domesticated silkmoth, Bombyx mori (Latin: "silkworm of the mulberry tree"). It is an important economic insect since it is the producer of silk. A silkworm's preferred food is white mulberry leaves, but it may also eat the leaves of the Osage Orange or the Tree of Heaven. It is entirely dependent on humans for its reproduction and no longer occurs naturally in the wild. Sericulture has been practised for at least 5,000 years in China.It was domesticated from the wild silkmoth Bombyx mandarina which has a range from northern India to northern China, Korea, Japan and far eastern Russia. It derives from Chinese rather than Japanese or Korean stock.[1] The breeding of silkworms cannot have originated before the Neolithic as the tools necessary to make use of the silk thread on a large scale only have become available since then. The domesticated and wild species can still breed and so hybridize together.The full genome of the silkworm was published in 2008 by the International Silkworm Genome Consortium.[2]
How long does it take for a silkworm to make a cacoon?
They will hatch 14 days (2 weeks) after being refridgerated over night
What is the primary hypothesis for the extinction of large mammals such as mammoth?
The primary hypothesis is that they were led to extinction by hunting by humans.
Did the Earth experience a time of large-scale extinction?
Yes, it has.
Is a species that has few individuals at greater risk of extinction than a species that has a large population size?
Yes , species with very small populations are at the verge of extinction as compared to large population .
What is the reason for the extinction of large animals?
Usaully the extinction of large animals is due to them dying out, eating each other at young which stops the production of the babies, or leaving their homeland for an unknown reason.
What are examples of mass extinctions?
The K-T (Cretaceous and Tertiary) boundary event thought to have been caused by the impact of a large meteorite forming the Chicxulub crater as well as very large scale volcanic activity (in this case the large igneous province known as the Deccan Traps) is a very good example and is thought to have been responsible for the extinction of the dinosaurs.
How does the Cretaceous-Tertiary extinction relate to the age of Mammals?
The extinction of so many organisms left a large ecological niche to expand into, which mammals did.
When all the in individuals of a species have died what is it called?
The death of every member of a species is called extinction. When a large number of different species is dies out at the same time it is called mass extinction.
How large was the Permian mass extinction?
95 percent of Earth's life was killed by hydrogen sulphide.
What is the large-scale disappearence of many species within a short time called?
Mass extinction
What has occurred when large numbers of species Die over a short period of time?
Mass Extinction
