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Yogita Ingle 7 years, 3 months ago
Biodiversity further classifies into three major types. They are:
- Genetic Diversity: It is basically the variety of species expressed at the genetic level by each individual in a species. No two individuals belonging to the same species are exactly similar. For example, in the species of human beings, each human shows a lot of diversity in comparison to another human. People living in different regions show a great level of variation.
- Species Diversity : It is the biodiversity observed within a community. It stands for the number and distribution of species. The number of species in a region varies widely depending upon the varied environmental conditions. For example, it is usually observed that civilizations residing beside water bodies show more species than the one compared to the areas away from water bodies.
- Ecological Diversity: It defines the diversity observed among the ecosystems in a particular region. Different ecosystems like mangroves, rainforests, deserts, etc., show a great variety of life forms residing in them.
Posted by Babita Chakma 7 years, 3 months ago
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Yogita Ingle 7 years, 3 months ago
- Enzymes: Enzymes mostly carry out all numerous chemical reactions which take place within a cell. They also help in regenerating and creating DNA molecules and carry out complex processes.
- Hormones: Proteins are involved in the creation of various types of hormones which help in balancing the components of the body. For example hormones like insulin, which helps in regulating blood sugar and secretin. It is also involved in the digestion process and formation of digestive juices.
- Antibody: Antibody also known as an immunoglobulin. It is a type of protein which is majorly used by the immune system to repair and heal the body from foreign bacteria. They often work together with other immune cells to identify and separate the antigens from increasing until the white blood cells destroy them completely.
- Energy: Proteins are the major source of energy that helps in the movements of our body. It is important to have the right amount of protein in order to convert it into energy. Protein, when consumed in excess amounts, gets used to create fat and becomes part of the fat cells.
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The excretory system consists of the organs that remove metabolic wastes from the body. In humans, this includes the removal of liquid nitrogenous waste in the form of urine, and solid wastes especially from the breakdown of hemoglobin. The removal of urine is accomplished by the urinary tract, while solid wastes are expelled through egestion from the large intestine.
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Meghna Thapar 5 years, 7 months ago
A growth curve is an empirical model of the evolution of a quantity over time. Growth curves are widely used in biology for quantities such as population size or biomass, individual body height or biomass. Values for the measured property can be plotted on a graph as a function of time; Two types of population growth patterns may occur depending on specific environmental conditions: An exponential growth pattern (J curve) occurs in an ideal, unlimited environment. A logistic growth pattern (S curve) occurs when environmental pressures slow the rate of growth.
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Meghna Thapar 5 years, 7 months ago
Taenia (Tapeworm) and Fasciola (liver fluke) are examples of parasitic platyhelminthes.
Peculiar features in parasitic platyhelminthes are as follows.
1. They have dorsiventrally flattened body and bear hooks and suckers to get attached inside the body of the host.
2. Their body is covered with thick tegument, which protects them from the action of digestive juices of the host.
3. The tegument also helps in absorbing nutrients from the host’s body.
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The skeletal muscles are also called as voluntary muscles and are under control of the human body. These are usually present in the different parts of the body such as the body wall, legs, neck, face, etc. They are also found attached to bones through the tendons. These tendons help in different movements of the body parts and skeleton. These muscle fibers, when seen under the microscope, are in the form of stripes, which are also called as striated muscles. These skeletal muscles are mainly responsible for the movement and locomotion in the human body.
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Nuclear pores are pores in nuclear membrane. They are are formed by the fusion of its two membranes.
Functions of nuclear pores :
1. The materials are exchanged between cytoplasm and nucleus through nuclear pores.
2. The proteins are passed in and out of the nucleus through nuclear pores.
3. The enzymes for synthesis of DNA and RNA are passed into nucleus through nuclear pores.
4. Ribosomal subunits and RNA are passed out from nucleus via nuclear pores.
5. m RNA and t RNA are passed out into cytoplasm via nuclear pores.
Posted by Ishita Ishita 7 years, 3 months ago
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Cuscuta is called parasite because it derives valuable nutrients and deprives the host plant from them.
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Depending on the position of your body and the amount of food inside it, your stomach is capable of alterations in size and shape. Your empty stomach is about 12 inches long. At its widest point, it's about 6 inches across.The stomach is a J-shaped organ that lies between the esophagus and the small intestine. It has three main functions: Stores ingested food and releases it into the small intestine at a rate that is optimal for digestion and absorption.
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Yogita Ingle 7 years, 3 months ago
Diffusion pressure deficit (DPD) : It is the decrease in diffusion pressure of water in a solution over its pure state.
The diffusion pressure of pure water is maximum and it continues to decrease as more and more solute is added into it.
D.P.D = O.P - T.P
Where, D.P.D. = Diffusion pressure deficit
O.P = Osmotic pressure
T.P = Turgor pressure
Posted by Mahesh Rd 7 years, 3 months ago
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