Life Around You – Maharashtra Board Class 9 Solutions for Science and Technology (English Medium)
- Cell wall of fungi is made up of tough and complex sugars called chitin.
- Hemichordata possess gill slits for respiration.
- Science of classification and nomenclature of organisms is called taxonomy.
- Mammals are unisexual and viviparous.
- Etcher classified plants on the basis of “structure of flowers”.
- Volvox is blue green algae.
- Gymnosperms bear separate male and female flowers called as sporophylls.
- Bat is a flying mammal.
- Spirogyra (Others are fungi).
- Cycas (Others are bryophytes).
- Frogs (Others are reptiles).
- Parrot (Others are mammals).
- Mango : Mangifera indica :: Tulsi : Ocimum sanctum
- Rose : Rosa gallica :: Wheat : Triticum aestivum
- Alcedo atthis : Aves :: Homo sapiens : Mammalia
- Paramoecium : Cilia :: Prawn : Jointed appendages
Classification as per hierarchy:
- Birds have a streamlined and spindle-shaped body which reduces the resistance while flying.
- Their forelimbs are modified into wings which are used for flying.
- They have hollow bones and an exoskeleton of feathers which make them lighter.
- Birds have air sacs in their body which give buoyancy.
- In this way, birds are adapted to the aerial mode of life.
- Heterotrophic organisms use decaying organic matter as food.
- Fungi are non-green organisms. They cannot prepare their own food by photosynthesis as they lack chlorophyll.
- They use decaying organic matter as food.
- Therefore, fungi are heterotrophic.
- Endoparasites live inside the stomach or intestine of the host. They get all the necessary nutrition in the readymade form from the host’s digestive tract.
- They remain attached by hooks and suck nutrition through their suckers.
- Thus, they do not need a digestive system of their own.
- Therefore, the digestive system is feebly developed in endoparasites.
- Binomial nomenclature is the method used for maintaining the identity of each living organism.
- Thus, the scientific name given consists of two terms. The first term denotes the name of the genus, and the second term denotes the name of the species.
- It gives a uniform and common international code for every organism.
- Therefore, the name of an organism is written in the binomial system.
- Frogs belong to Class Amphibia.
- They can respire in water through their skin, termed cutaneous respiration.
- When on land, they respire through the lungs, termed pulmonary respiration.
- Therefore, frogs can live on land as well as in water.
- Tulsi (Ocimum sanctum) has the following characteristics:
- Tap roots
- Pentamerous symmetry in flowers
- Seeds enclosed in fruits
- Presence of vascular tissues
- All these characteristics are important characteristics of Angiosperms which are shown in Tulsi.
- Therefore, Tulsi (Ocimum sanctum) is a member of Angiosperm.
- The reddish brown spots on the dorsal side of fern leaflets are sori.
- Each sorus contains many sporangia which form spores.
- Plants reproduce asexually by spores.
- Because fern reproduces asexually by spores, its leaflets bear sporangia in groups (sori) which appear as brown spots.
- False (The heart of mammals is four chambered.)
- False (Arthropods are invertebrate animals.)
- False (All forms of life on Earth are dissimilar.)
- Oviparous: Animals which lay eggs after sexual reproduction are called oviparous.
- Warm blooded: Animals which can regulate their body temperature to a constant level irrespective of their surrounding temperature are called warm blooded animals
- Parasites: Individuals which depend on other host organisms for food, shelter and other needs and cause harm to the host are called parasites.
Differences between Platyhelminthes and Nemathelminthes:
Differences between algae and fungi:
Differences between non-chordates and chordates:
Differences between Gymnosperms and Angiosperms: