Science Quiz : Science Basics And Living Organisms.

The cells of organisms require energy for various processes, including growth and repair. This energy is obtained through cellular respiration, where glucose is broken down to release ATP, the energy currency of cells. This ATP is then utilized in processes like protein synthesis, cell division, and tissue repair. Therefore, it is true that cells use energy for growth and repair.

Most cells can only be seen with a microscope because they are too small to be visible to the naked eye. Microscopes allow us to magnify the cells and observe their structures and functions in detail. While some larger cells, such as chicken eggs or human ova, can be seen without a microscope, the majority of cells, including those in plants, animals, and microorganisms, require the use of a microscope for observation. Therefore, the statement "Most cells can be seen only with a microscope" is true.

The correct answer is False. The statement "And unicellular cell is Many cells" is incorrect. Unicellular organisms are composed of a single cell, not multiple cells. They are capable of carrying out all necessary functions for survival within that single cell.

Living things have homeostasis because the condition, or internal environment, must be just right for the function, or proper functioning, of the organism. Homeostasis refers to the ability of an organism to maintain stable internal conditions despite changes in the external environment. This is crucial for the organism to carry out its various functions and processes effectively.

The correct answer is "Spontaneous Generation." Spontaneous Generation is the idea that living organisms can arise from nonliving matter. This concept was widely believed in ancient times, but it was later disproven by experiments conducted by Louis Pasteur in the 19th century. These experiments showed that living organisms can only come from pre-existing living organisms, through processes such as reproduction or germination. Therefore, the idea of living things coming from nonliving sources is referred to as Spontaneous Generation.

The dependent variable is the variable that is expected to change because of the other variable. In an experiment, the dependent variable is the one that is measured or observed to determine the effect of the independent variable. It is called "dependent" because its value depends on the value of the independent variable. Therefore, the correct answer is the dependent variable.

An independent variable is the variable that is manipulated or changed by the researcher in an experiment. It is the variable that is being tested to see how it affects the dependent variable. In other words, it is the variable that the researcher has control over and can change to observe its impact on the outcome of the experiment.

The correct order of steps in the Scientific Method is as follows: 1) Identify a problem or question, 2) Observe nature carefully, and 3) Make a prediction. This order ensures that scientists first identify a problem or question that they want to investigate, then carefully observe the natural world to gather data and information, and finally use this information to make a prediction or hypothesis about the problem or question.

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(Try to think about what sounds more efficient.)

Water is the most abundant chemical in cells because it makes up approximately 70% of the total cell mass. It is essential for various cellular processes such as metabolism, transportation of nutrients, and maintaining cell structure. Water also serves as a solvent for many biological molecules, allowing them to interact and participate in biochemical reactions. Additionally, water helps maintain the proper pH balance and temperature within cells, ensuring optimal conditions for cellular functions.

Control in a scientific experiment refers to a trial or group that is used as a reference point for comparison. It is a standard against which the experimental results are measured. By having a control group, researchers can determine the effect of the independent variable by comparing it to the control group, which remains unchanged. This allows for the identification of any changes or differences caused by the independent variable, providing a basis for drawing conclusions and making valid scientific claims.

A hedotroph is an organism that cannot make its own food. This means that it relies on obtaining nutrients and energy from external sources, such as consuming other organisms or organic matter. Unlike autotrophs, which can produce their own food through processes like photosynthesis, hedotrophs are heterotrophs that depend on external food sources for their survival.