B. Short answer questions:
1. How Monera are different from Protista ?
2. Define the following terms:
(1) Coelom (in) Oviparous (iii) Viviparous (iv) Haemocoel () Classification.
3. Tabulate the differences between vertebrates and invertebrates.
4. Why is it necessary to classify the living world ?
Answers
Explanation:
1. Ans. The basic difference between them is – Monera are unicellular and prokaryotic cellular structures, whereas Protista are unicellular and eukaryotic cellular structure. Cell organelles are absent in Monera, but Protista is well-defined and has membrane-bound organelles.
2.
coelom (or celom) is the main body cavity in most animals and is positioned inside the body to surround and contain the digestive tract and other organs. In some animals, it is lined with mesothelium. In other animals, such as molluscs, it remains undifferentiated.
Oviparous and viviparous are such two methods. ... This means oviparous animals lay eggs. These eggs develop and hatch into young individuals. In contrast, viviparous animals are born as live young individuals. Therefore, they do not lay eggs.
The haemocoel is the main body cavity of invertebrates, such as insects. ... Instead insects have a cavity that is full of insect blood (known as haemolymph) and the organs of the insect are suspended in this cavity.
Invertebrates Vertebrates
Invertebrates do not have a backbone. Vertebrates have a backbone and an internal skeleton.
Have an open circulatory system in the body. Have a closed circulatory system in the body.
4. It is necessary to classify organisms because: ... It helps in the identification of living organisms as well as in understanding the diversity of living organisms. Classification helps us to learn about different kinds of plants and animals, their features, similarities and differences.