Living things are defined in terms of the activities or functions that are missing in nonliving things. The life processes of every organism are carried out by specific materials assembled in definite structures. Thus, a living thing can be defined as a system, or…
Whether an organism is a human or a bacterium, its ability to reproduce is one of the most important characteristics of life. Because life comes only from preexisting life, it is only through reproduction that successive generations can carry on the…
The study of the relationships of living things to each other and to their environment is known as ecology. Because these interrelationships are so important to the welfare of Earth and because they can be seriously disrupted by human activities, ecology has become an important…
In his theory of natural selection, which is discussed in greater detail later, Charles Darwin suggested that “survival of the fittest” was the basis for organic evolution (the change of living things with time). Evolution itself is a biological phenomenon common to all living things,…
All living organisms, regardless of their uniqueness, have certain biological, chemical, and physical characteristics in common. All, for example, are composed of basic units known as cells and of the same chemical substances, which, when analyzed, exhibit noteworthy similarities, even in such disparate organisms…
The concept of homeostasis—that living things maintain a constant internal environment—was first suggested in the 19th century by French physiologist Claude Bernard, who stated that “all the vital mechanisms, varied as they are, have only one object: that of preserving constant the…
biology, study of living things and their vital processes. The field deals with all the physicochemical aspects of life. The modern tendency toward cross-disciplinary research and the unification of scientific knowledge and investigation from different fields has resulted in significant overlap of the…
Chemical Properties of Niobium Group 5 Melting point 2410 °C Period 5 Boiling point 5100 °C Block d Density (g cm−3) 8.57 Atomic number 41 Relative atomic mass 92.906 State at 20°C Solid Key isotopes 93Nb Electron configuration [Kr] 4d4 5s1…
In probability theory, there are many applications of combinatorics. For example, when we find the probability of occurrence of a particular event A, we can use the below formula: P(A) = Probability that A occurs = Number of outcomes where…
Example 1: Arrange the letters of the word TAMIL so that Solution: Let’s consider LT as one letter and keep it together. Now we have 4 alphabets that can be arranged in a row in 4�4= 24. (General formula, nPr) L and…