The Living World 6th Edition by George Johnson, Jonathan Losos,William Ober,Claire Garrison

Question

The Living World 6th Edition by George Johnson, Jonathan Losos,William Ober,Claire Garrison

النسخة 6الرقم المعياري الدولي: 978-0077280086

The Living World 6th Edition by George Johnson, Jonathan Losos,William Ober,Claire Garrison

النسخة 6الرقم المعياري الدولي: 978-0077280086

تمرين 1

Living things are organized. Choose the answer that illustrates this complexity, and is arranged from smallest to largest.
A) cell, atom, molecule, tissue, organelle, organ, organ system, organism, population, species, community, ecosystem
B) atom, molecule, organelle, cell, tissue, organ, organ system, organism, population, species, community, ecosystem
C) atom, molecule, organelle, cell, tissue, organ, organ system, organism, community, population, species, ecosystem
D) atom, molecule, cell wall, cell, organ, organelle, organism, species, population, community, ecosystem

التوضيح

موثّق

The organization of living things is done based on the complexity. The complexity is considered at cellular level, organismal level and population level.
At cellular level, complexities within the cell are considered. The basic matter of each element is atom. Atom join together to form molecules. More complex molecules are called macromolecules. Macromolecules found in a small compartment within cell are called organelle, and the last at the cellular level is the cell itself, which is the basic unit of life.
Hence, option

and

are incorrect.
At organismal level, there are four levels of complexity. A group of cells that perform same function is called a tissue. The group of tissues that function together to form a structural and functional unit is called an organ. Example is brain. A group of organs that function together is called an organ system. Example, nervous system which include brain, spinal cord, nerves and sense organs. The different organ systems functions together to form an organism. At the population level there are again four levels. The first level is the population, which is a group of organism of same species that live in a particular place. The next is the species, which are organisms of similar appearance that interbreed. The next level is the community, which includes all organisms of different species living in a particular place. The highest level of complexity is the ecosystem, which include all organisms in a place along with the soil and water in that place.
Since, community comes after population and species, option

is incorrect.
When we arrange organizational levels from smallest to the largest, the order is atom, molecule, macromolecule, organelle, cell, tissue, organs, organ systems, organism, population, species, community and ecosystems.
Hence, the correct answer is option

.