1.
All organisms possess DNA. DNA
Correct Answer
C. Contains information for growth and development.
Explanation
DNA contains the genetic information that determines an organism's traits, including its growth and development. This information is encoded in the sequence of nucleotides within the DNA molecule. Through processes such as transcription and translation, this genetic information is used to produce proteins that are essential for the growth and development of cells and the entire organism. Therefore, the correct answer is that DNA contains information for growth and development.
2.
Homeostasis means
Correct Answer
B. Keeping things the same.
Explanation
Homeostasis refers to the ability of an organism or system to maintain a stable internal environment despite external changes. It involves various physiological processes that work together to regulate temperature, pH levels, blood sugar, and other variables within a narrow range. By keeping things the same, homeostasis ensures that an organism can function optimally and maintain its internal balance. It is not related to rapid change, evolution, or change over long periods of time.
3.
Which of the following is not necessarily a characteristic of living things?
Correct Answer
C. complexity
Explanation
Complexity is not necessarily a characteristic of living things because there are some living organisms that are simple in structure and organization, such as bacteria. Although complexity can be observed in many living organisms, it is not a defining characteristic that all living things must possess. Homeostasis refers to the ability of an organism to maintain a stable internal environment, metabolism refers to the chemical processes that occur within an organism to sustain life, and reproduction refers to the ability of an organism to produce offspring.
4.
The smallest units that can carry on all the functions of life are called
Correct Answer
B. cells.
Explanation
Cells are the smallest units that can carry on all the functions of life. They are the basic building blocks of all living organisms and are capable of reproducing, growing, responding to stimuli, and carrying out metabolic activities. Cells contain various organelles, such as the nucleus, mitochondria, and ribosomes, which perform specific functions within the cell. Molecules, on the other hand, are made up of atoms and are the smallest units of chemical compounds. Species, on the other hand, refers to a group of organisms that can interbreed and produce fertile offspring. Therefore, cells are the correct answer as they are the fundamental units of life.
5.
Living things
Correct Answer
D. All of the above
Explanation
The correct answer is "All of the above" because living things do indeed need energy for life processes, such as metabolism and growth. They also have the ability to reproduce, either sexually or asexually, to ensure the continuation of their species. Additionally, living things are composed of cells, which are the basic structural and functional units of life. Therefore, all three statements are true and encompass the characteristics of living things.
6.
All organisms are composed of
Correct Answer
C. Cells.
Explanation
The correct answer is "cells" because cells are the basic structural and functional units of all living organisms. They are responsible for carrying out essential life processes and are the building blocks of tissues, organs, and systems in organisms. Diatoms and cellulose are specific components or substances found in some organisms, but not all organisms are composed of them. Therefore, the most accurate and inclusive answer is "cells."
7.
All living things maintain a balance within their cells and the environment through the process of
Correct Answer
C. Homeostasis.
Explanation
Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in the external environment. It involves regulating various factors such as temperature, pH levels, and nutrient levels to ensure optimal conditions for cellular function and survival. Growth and development are related processes, but they do not specifically refer to the maintenance of balance. Evolution, on the other hand, refers to the gradual change in species over time and is not directly related to maintaining balance within cells and the environment.
8.
Which of the following is a characteristic of all living things?
Correct Answer
C. Development
Explanation
Development is a characteristic of all living things because it refers to the process of growth, maturation, and differentiation from a simple to a more complex form. Living organisms undergo various stages of development throughout their lifespan, including embryonic development, growth, and aging. This process allows living organisms to adapt, reproduce, and evolve over time. Development is a fundamental characteristic that distinguishes living things from non-living things.