1. What was the modification introduced by Woese in kingdom Monera?
2. What do you understand by diploblasty? Give one example of an organism that is diploblastic.
3. Homo sapiens is the scientific name of human beings. What do these two terms imply ?
4. Name two egg-laying mammals.
5. Prawn, houseflies, and spiders belong to one group.
(i) Name the group.
(ii)Justify the name given to this group.
6. What is meant by warm-blooded and cold-blooded animals? Explain.
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Answers
Answer:
1 Carl Woese modified the kingdom Monera by dividing it into Archaebacteria and Eubacteria. Archaebacteria are unicellular prokaryotes which belong to the kingdom Archaea.
2 Diploblasty is a condition of the blastula in which there are two primary germ layers: the ectoderm and endoderm. ... Groups of diploblastic animals alive today include jellyfish, corals, sea anemones and comb jellies.
3 The scientific name of human beings is Homo sapiens and it was coined by Carl Linnaeus in the year 1758. Homo sapiens was derived from the Latin word, which refers to a wise man. Homo refers to the human being, which refers to wise or knowing.
4 Only two kinds of egg-laying mammals are left on the planet today—the duck-billed platypus and the echidna, or spiny anteater.
5 This is because all three have an exoskeleton, segmented body, and paired jointed appendages.
6 Cold-blooded animals can be defined as animals that cannot regulate their internal body temperature with the change in the environment. They cannot survive in extreme temperature conditions. ... Warm-blooded animals are defined as animals that can regulate and maintain constant internal body temperature.
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