Q2. How many types of respiratory systems are there?
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Q3. A polar bear belongs to which habitat.
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Q4. What are the ways by which the plants reproduce ?
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Q5. What is a seed ?
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Q6. What are the three main parts of a seed ?
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Q7. What is the functions of the seed coat ?
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q.2. two types of respiratory system
Answer:
1 It is divided into two sections: Upper Respiratory Tract and the Lower Respiratory Tract. Included in the upper respiratory tract are the Nostrils, Nasal Cavities, Pharynx, Epiglottis, and the Larynx. The lower respiratory tract consists of the Trachea, Bronchi, Bronchioles, and the Lungs
2 Polar bears are only found in the Arctic. The most important habitats for polar bears are the edges of pack ice where currents and wind interact, forming a continually melting and refreezing matrix of ice patches and leads (open spaces in the sea ice).
3 Asexual reproduction may occur through budding, fragmentation, fission, spore formation and vegetative propagation. Plants have two main types of asexual reproduction in which new plants are produced that are genetically identical clones of the parent individual.
4 the unit of reproduction of a flowering plant, capable of developing into another such plant
5 The three primary parts of a seed are the embryo, endosperm, and seed coat. The embryo is the young multicellular organism before it emerges from the seed. The endosperm is a source of stored food, consisting primarily of starches. The seed coat consists of one or more protective layers that encase the seed.
6 The endosperm is the food storage area of the seed. The purpose of the seed coat is to protect the seed from physical, temperature-related, or water damage. The seed coat also ensures that the plant seed remain in a state of dormancy until conditions are right for the plant embryo to germinate, or sprout.