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Yogita Ingle 5 years, 8 months ago
The heart is an organ that pumps blood throughout the body. It comprises four chambers:
- Atria (upper chambers)
- Ventricles (lower chambers)
The wall of the heart is made up of three layers:
- Epicardium- This is a protective layer made of connective tissues.
- Myocardium- This layer forms the heart muscles.
- Endocardium- This is the innermost layer and protects the valves and the heart.
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Yogita Ingle 5 years, 8 months ago
The 10 percent law was given by Raymond Lindeman which demonstrates the transfer of energy that takes place from one trophic level to the other.
According to the law, during the transfer of energy from one trophic level to another, only 10℅ is available for the next trophic level as the other 90℅ is lost as heat to the surroundings.
For example: In a given simple food chain-
Primary producer( Plants) ----> Primary consumer( deer) -------> Secondary consumer( Lion), the primary producers form the first trophic level, the primary consumers the second and so on. In this example, if the first level gets 1000kcal of energy, the next one gets 100 kcal while the third gets 10 kcal.
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Stranger?♋ Things 5 years, 8 months ago
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how's that
Yogita Ingle 5 years, 8 months ago
The larynx, commonly called the voice box, is an organ in the neck of mammals involved in protecting the trachea and sound production. It manipulates pitch and volume.
The pharynx is the part of the neck and throat situated immediately behind the mouth and nasal cavity. The pharynx is part of the digestive system and respiratory system of many organisms.
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Sandli __Thakur_✍?✍? 5 years, 8 months ago
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Lucifer? Morningstar? 5 years, 8 months ago
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Yogita Ingle 5 years, 8 months ago
(a) Aves also known as birds are group of vertebrates that can fly. While mammals are group of vertebrates that have mammary glands.
(b) Aves lay eggs while mammals give birth to babies.
(c) Aves have wings whereas mammals have hands, hooves, and paws.
(d) Aves have feathers while mammals have fur or hair.
(e) Aves have dual respiratory cycles whereas mammals have single respiratory cycle.
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Yogita Ingle 5 years, 8 months ago
When the milk is left at room temperature, the oxidation reaction occurs and the growth of microorganisms occur due to which it gets sour.
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Yogita Ingle 5 years, 8 months ago
Ohm's Law:
It states that the current through any two points of the conductor is directly proportional to the potential difference applied across the conductor provided that the physical conditions remains constant.
Unit:
It is measured in ohm represented as Ω.
Explanation:
When an electric potential difference is applied across the conductor, the current passes through it. Here some of the current is apposed by the resistance of the conductor in the circuit. Thus Ohm's Law is the relation between current, voltage and resistance.
According to Ohm's Law:
V α I
V = I R
Where R (resistance) is the constant or proportionality.
Ohm's Law is applicable only if all the physical conditions for example temperature, material or dimensions of the wire remain constant.
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Yogita Ingle 5 years, 8 months ago
The number of atoms present in a single molecule is termed as its atomicity. It can be classified into three types.
The molecules of many elements are composed of only a single atom of that element. They are termed as monoatomic. For instance, Ar (Argon), He(Helium). So their atomicity is one.
On the other hand the molecules of many elements are composed of two atoms of that element. For instance, oxygen can never exist independently and exist as O2 molecule known as diatomic So its atomicity is 2.
The molecules of many elements are composed of three atoms of that element. They are termed as triatomic For instance, O3, CO2. So their atomicity is 3.
The molecules of many elements are composed of four atoms of that element. They are termed as tetra atomic For instance, P4, SO3. So their atomicity is 4.
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Ajay Didel 5 years, 8 months ago
1Thank You