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Preeti Dabral 4 years, 1 month ago
The key difference between mycorrhiza and coralloid roots is that mycorrhiza is a type of mutualistic association occurring between a higher plant and a fungus while coralloid roots are negatively geotropic roots of cycads which are in a mutualistic association with nitrogen-fixing cyanobacteria.
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- Make a story from the sound bites.
- Clearly differentiate similar plants.
- Get your friends or family to adopt a botanical name.
- Put up plant names around the house.
- Make flash cards.
- Use Apps.
- Look up the meaning of botanical names.
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The Monerans are unicellular organisms.
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They contain 70S ribosomes.
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The DNA is naked and is not bound by a nuclear membrane.
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It lacks organelles like mitochondria, lysosomes, plastids, Golgi bodies, endoplasmic reticulum, centrosome, etc.
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They reproduce asexually by binary fission or budding.
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The cell wall is rigid and made up of peptidoglycan.
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Flagellum serves as the locomotory organ.
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These are environmental decomposers
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They show different modes of nutrition such as autotrophic, parasitic, heterotrophic, or saprophytic.
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Homeothermic is an antonym of poikilotherm. As adjectives the difference between homeothermic and poikilotherm is that homeothermic is (biology|of an|animal) capable of maintaining a relatively constant body temperature independent of the surrounding environment while poikilotherm is cold-blooded.
Posted by P.Akshitha Reddy 4 years, 2 months ago
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Exocrine glands are named apocrine glands, holocrine glands, or merocrine glands based on how their products are secreted.
- Merocrine secretion – cells excrete their substances by exocytosis into a duct; for example, pancreatic acinar cells, maximum sweat glands of humans, goblet cells, intestinal glands, tear glands, etc.
- Apocrine secretion – a portion of the cell membrane that contains the excretion buds off. Examples are sweat glands of arm pits, pubic region, skin around ****, lips and nipples; mammary glands, etc.
- Holocrine secretion – the entire cell disintegrates to excrete its substance; for example, sebaceous glands of the skin and nose, meibomian gland, zeis gland, etc.
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The next stage of prophase I in meiosis is the zygotene stage. During this stage, the chromosomes attach themselves by their ends (telomeres) to the inner membrane of the nuclear envelope.
Posted by Haritima Hada 4 years, 2 months ago
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Preeti Dabral 4 years, 2 months ago
Nucleo - protein complex formation stage is observed during the pachytene stage of the meiosis type of cell division. In this stage a protein is formed between the two homologus chromosomes and may led to chromosomal pairing or synapsis.
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Preeti Dabral 4 years, 2 months ago
TRANSMISSION OF NERVE IMPULSE
- Normal State/ Polarized State
In the normal (resting) condition, the outer side of the nerve fiber carries positive (+) charge. This is called polarized state. At this state more Na+ ions are outside the the axon membrane.
- On Stimulation (Depolarized State),
The axon membrane at the spot where stimulation takes place becomes more permeable to Na+ which move inwards and cause loss of Polarization, i.e., they become excited (depolarized state).
- Repolarization
Meanwhile, the previous region become Repolarized due to active transport of Na+ ions again to the outside. (This transport is achieved by using energy thru ATP and its called ‘‘Sodium Pump’’).
‘‘Conduction of nerve impulse is a wave of depolarization followed by repolarization’’
Which means conduction of nerve impulse takes place by the movement of Na+ ions in and out of the axon membrane. While depolarization, Na+ ions move inside the membrane, and during repolarization they move outside the membrane due to the active transport of Na+ ions using energy thru ATP.
Posted by Ansh Sahu 4 years, 2 months ago
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Preeti Dabral 4 years, 2 months ago
Holozoic nutrition involves the ingestion and internal processing of solid and liquid food in an organism. This involves the steps of ingestion, digestion, absorption, assimilation and excretion. Ingestion is the intake of food, which is broken down into simpler organic matters by a process called digestion.
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Nisha Bharti 4 years, 1 month ago
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