1 Biology: The study of life (wks 1-3) Flashcards
Distinguish between an ecosystem and a population in the levels of biological organization.
A population is a group of species in the same area, populations are part of a community which includes interacting populations within an area, and the ecosystem is made up of the community of interacting populations of organisms and the physical environment they are in.
Define an atom.
The smallest unit of an element composed of electrons, protons, and neutrons.
What is the smallest unit of an element?
An atom.
Define a molecule.
A union of two or more atoms of the same
Or different elements.
Describe the biological hierarchy between atoms and cells.
Biological organization begins with atoms, the basic units of matter, atoms, combine to form small molecules, which join to form larger molecules called macromolecules within a cell, which is the smallest and most basic unit of life.
What is a cell?
The smallest,most basic unit of life. The structural and functional unit of all living organisms.
What is the biosphere?
The biosphere is the collective of all the earth’s ecosystems and which are regions of the earths crust, waters and atmosphere which are inhabited by living organisms
What is an ecosystem?
The ecosystem is a community plus the physical environment it exists in
What is a Community?
A community is interacting populations in a particular area
What is the population?
Organisms of the same species in a particular area
What is a species
A group of similar interbreeding organisms
What is an organism?
An organism is an individual complex individual organisms contain organ systems
What is an organ system?
An organ system is composed of several organs working together
What is an organ?
An organ is composed of tissues functioning together for a specific task
What is tissue?
Tissue is a group of cells with a common structure and function
Explain how organ systems are formed in a multicellular organism
in Multicellular organisms, similar cells may combine to form a tissue for example, the nerve and muscle tissues of animals tissues make up organs such as the brain or Alise organs work together to form organ systems. For example, the brain works with the spinal cord and a network of nerves to form the nervous system organ systems are joined together to form an organism such as an elephant.
What makes up an organ?
Tissues, which are made up of similar cells
What is energy?
The capacity to do work, including the work, it takes to maintain the organization of the cell and the organism
What is metabolism?
Metabolism, encompasses all the chemical reactions that occur in a cell. For example, when cells use nutrient molecules to make their parts and products they carry out a sequence of chemical reactions.
