Biological Concepts and Definitions

The video explores the hierarchy of life, starting from atoms and molecules, progressing through cells, tissues, and organs, and culminating in ecosystems. It emphasizes the concept of systems and emergent properties, illustrating how smaller systems combine to form larger, more complex systems. The video also discusses the interactions between biotic and abiotic factors within ecosystems.

What is a system in the context of biology?

• A single cell

• An interdependent group of items forming a unified whole

• A single organism

• A random collection of objects

What are emergent properties?

• Properties that do not change

• Properties that are always visible

• Properties that arise from interactions among smaller parts

• Properties that are present in individual parts

What is the smallest unit that retains the properties of an element?

• Organ

• Atom

• Molecule

• Cell

Which of the following is a macromolecule?

• Water

• Protein

• Oxygen

• Carbon dioxide

What is an organelle?

• A type of organism

• A group of tissues

• A specialized structure within a living cell

• A type of cell

Which of the following is a characteristic of eukaryotic cells?

• Presence of nucleus

• Lack of nucleus

• No organelles

• Single-celled only

What is a tissue?

• A group of cells specialized for different functions

• A type of macromolecule

• A single cell

• A group of organs

What defines an organ system?

• A single organ

• A group of organs working together

• A single tissue

• A group of cells

What is a population in ecological terms?

• A single organism

• A group of ecosystems

• A number of organisms of the same species in a specific area

• A group of different species

What is an ecosystem?

• A single species

• A group of cells

• A biological community interacting with its physical environment

• A single organ