Скачать или смотреть Living world class 11 biology chapter 1 Exercise solutions | maharashtra board

Living world class 11 biology chapter 1 Exercise solutions | maharashtra board

Living world | class 11 | chapter 1 | exercise | textbook solutions


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answers in text form
3. Answer the following questions.
A. Jijamata Udyan, the famous zoo in
Mumbai has acclimatised humbolt
penguins. Why should penguins be
acclimatised when kept at a place away
from their natural habitat?.
Answer:

• Zoological park (zoo) is a type of ex-situ conservation in which wild animals are kept in captivity.

• Humboldt penguins are native to South America and the surrounding environment differs significantly at Jijamata Udyan (zoo) in Mumbai.

• In order to ensure that these penguins survive longer and are healthy they need to be acclimatised (adjust) to their new environment slowly.

• If they are not acclimatised or the facilities in the zoo where the penguins are kept are not optimal/ suitable, they may develop abnormal stress and exhibit unusual behaviours due to it.

• These penguins may also be more prone to contracting certain diseases, since they are suited to living in a particular climatic condition.

B. Riya found peculiar plant on her visit to
Himachal Pradesh. What are the ways
she can show it to her biology teacher and
get information about it?
• Riya can press and mount the plant specimen on a herbarium sheet and preserve the dried plant material, until she returns back from her visit.

• She can also write any available information regarding the collected specimen on the herbarium sheet, which can be useful for further studies with her biology teacher.

• Various taxonomical aids can be useful to get information about this peculiar plant.

C. At Andaman, authorities do not allow
tourists to collect shells from beaches.
Why it must be so?
Answer:

• Seashells are an important part of the coastal ecosystem and are crucial for the survival of various marine creatures.

• They provide material for building nests of birds and also act as a substratum for attachment of algae, sea grass, sponges and various microbes.

• Fishes use shells for hiding from predators, whereas hermit crabs use shells as temporary shelters.

• Removal of seashells from seashores may also indirectly affect the rate of shoreline erosion.

Hence, in an attempt to protect the ecosystem, authorities in Andaman do not allow tourists to collect shells from beaches.

D. Why do we have green house in botanical gardens?
Answer:

• Greenhouse is a structure with suitable walls and a roof in which plants are grown under regulated climatic conditions.

• Most botanical gardens exhibit ornamental plants which require stringent/ optimum climatic conditions for their growth and/or flowering.

• The greenhouse associated with botanical gardens are also used to grow and propagate those plants that may not survive seasonal.

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