Protozoa are called early animals because like animals they lack cell wall and have holozoic-type heterotrophic nutrition. They have glycogen as the reserve food. They have however, unicellular nature and are without an embryonic stage in their life cycle. Protozoa evolved before the origin and evolRead more
Protozoa are called early animals because like animals they lack cell wall and have holozoic-type heterotrophic nutrition. They have glycogen as the reserve food. They have however, unicellular nature and are without an embryonic stage in their life cycle. Protozoa evolved before the origin and evolution of true animals or metazoa.
Euglena is called plant-animal because it has characteristics of both plants and animals. Like plants, Euglena has chloroplasts with the help of which it performs autotrophic nutrition by photosynthesis. Like animals, it lacks cell wall, possess pellicle, an anterior invagination" flagellum, eye spoRead more
Euglena is called plant-animal because it has characteristics of both plants and animals. Like plants, Euglena has chloroplasts with the help of which it performs autotrophic nutrition by photosynthesis. Like animals, it lacks cell wall, possess pellicle, an anterior invagination” flagellum, eye spot, etc, and capable of obtaining readymade food in dark (heterotrophic).
The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heRead more
The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heterotrophic and they can move. Thus, the body design of the two groups is based on the need to make their own food in case of plants and to acquire it from external source in case of animals. The other characteristics such as Presence or absence of skeleton, etc., are used to make subgroups among animals.
The major characteristics used to classify animals in Vertebrata are: 1. The kind of exoskeleton or endoskeleton. 2. The kind of respiratory organs. 3. The method of reproduction and giving birth to young ones. On the basis of above mentioned characters the vertebrata is divided into following classRead more
The major characteristics used to classify animals in Vertebrata are: 1. The kind of exoskeleton or endoskeleton. 2. The kind of respiratory organs. 3. The method of reproduction and giving birth to young ones. On the basis of above mentioned characters the vertebrata is divided into following classes.
1 Exoskeleton of scales: Endoskeleton of cartilage or bones; breathing through gills – pisces (fishes).
2. Breathing through gills only in larva ; skin slimy – Amphibia
3. Exoskeleton of scales or scutes ;laying eggs outside the water – Reptilia.
4. Exoskeieton of feathers; lays eggs ; flight possible – Aves (birds).
5. Exoskeleton of hair; external ears, ; give birth to young ones – Mammalia.
The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heRead more
The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heterotrophic and they can move. Thus, the body design of the two groups is based on the need to make their own food in case of plants and to acquire it from external source in case of animals. The other characteristics such as Presence or absence of skeleton, etc., are used to make subgroups among animals.
Define phylogeny.
Phylogeny is ancestry of an organisms i.e., evolutionary history of an organism.
Phylogeny is ancestry of an organisms i.e., evolutionary history of an organism.
See lessGive one point of difference between Gymnosperms and Angiosperms.
Seeds are naked or exposed in gymnosperms but they are covered by fruit wall or pericarp in angiosperms.
Seeds are naked or exposed in gymnosperms but they are covered by fruit wall or pericarp in angiosperms.
See lessWhat is haemocoel? Which groups of animals have haemocnel?
The blood-filled cavity consisting of spaces in between organs is known as haemocoel. Examples. Mollusca and Arthropoda.
The blood-filled cavity consisting of spaces in between organs is known as haemocoel. Examples. Mollusca and Arthropoda.
See lessName the organisms which has (i) Setae and parapodia (ii) Tube feet.
(i) Nereis, (ii) Starfish.
(i) Nereis, (ii) Starfish.
See lessWhy are protozoa are called early animals?
Protozoa are called early animals because like animals they lack cell wall and have holozoic-type heterotrophic nutrition. They have glycogen as the reserve food. They have however, unicellular nature and are without an embryonic stage in their life cycle. Protozoa evolved before the origin and evolRead more
Protozoa are called early animals because like animals they lack cell wall and have holozoic-type heterotrophic nutrition. They have glycogen as the reserve food. They have however, unicellular nature and are without an embryonic stage in their life cycle. Protozoa evolved before the origin and evolution of true animals or metazoa.
See lessWhy is Euglena is called plant-animal?
Euglena is called plant-animal because it has characteristics of both plants and animals. Like plants, Euglena has chloroplasts with the help of which it performs autotrophic nutrition by photosynthesis. Like animals, it lacks cell wall, possess pellicle, an anterior invagination" flagellum, eye spoRead more
Euglena is called plant-animal because it has characteristics of both plants and animals. Like plants, Euglena has chloroplasts with the help of which it performs autotrophic nutrition by photosynthesis. Like animals, it lacks cell wall, possess pellicle, an anterior invagination” flagellum, eye spot, etc, and capable of obtaining readymade food in dark (heterotrophic).
See lessGive one example of each (i) Asymmetry, radial symmetry and bilateral symmetry; (ii) Acoelomate, pseudocoelomate and haemocoelomate.
(i) Amoeba,Hydra and Frog. (ii) Platyhelminths (flatworms), Nematodes (round worms) and Arthropods (crab).
(i) Amoeba,Hydra and Frog.
See less(ii) Platyhelminths (flatworms), Nematodes (round worms) and Arthropods (crab).
How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heRead more
The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heterotrophic and they can move. Thus, the body design of the two groups is based on the need to make their own food in case of plants and to acquire it from external source in case of animals. The other characteristics such as Presence or absence of skeleton, etc., are used to make subgroups among animals.
See lessExplain how animals in Vertebrata are classified into further subgroups?
The major characteristics used to classify animals in Vertebrata are: 1. The kind of exoskeleton or endoskeleton. 2. The kind of respiratory organs. 3. The method of reproduction and giving birth to young ones. On the basis of above mentioned characters the vertebrata is divided into following classRead more
The major characteristics used to classify animals in Vertebrata are: 1. The kind of exoskeleton or endoskeleton. 2. The kind of respiratory organs. 3. The method of reproduction and giving birth to young ones. On the basis of above mentioned characters the vertebrata is divided into following classes.
See less1 Exoskeleton of scales: Endoskeleton of cartilage or bones; breathing through gills – pisces (fishes).
2. Breathing through gills only in larva ; skin slimy – Amphibia
3. Exoskeleton of scales or scutes ;laying eggs outside the water – Reptilia.
4. Exoskeieton of feathers; lays eggs ; flight possible – Aves (birds).
5. Exoskeleton of hair; external ears, ; give birth to young ones – Mammalia.
How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heRead more
The criteria (norms) for deciding divisions in plants are different from the criteria for deciding the sub- groups among animals because the basic designs of their body is different. This is mainly due to the fact that plants are autotrophic and often remain fixed to substratum, while animals are heterotrophic and they can move. Thus, the body design of the two groups is based on the need to make their own food in case of plants and to acquire it from external source in case of animals. The other characteristics such as Presence or absence of skeleton, etc., are used to make subgroups among animals.
See less